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joi, 19 aprilie 2012

Google AdWords

Google AdWords is Google's main advertising product and main source of revenue. Google's total advertising revenues were USD$28 billion in 2010.[2] AdWords offers pay-per-click (PPC) advertising, cost-per-thousand (CPM) advertising, and site-targeted advertising for text, banner, and rich-media ads. The AdWords program includes local, national, and international distribution. Google's text advertisements are short, consisting of one headline consisting of 25 characters and two additional text lines consisting of 35 characters each. Image ads can be one of several different Interactive Advertising Bureau (IAB) standard sizes.

Sales and Support for Google's AdWords division in the United States is based in Mountain View, California, with major secondary offices in Ann Arbor, Michigan,[3] the company's third-largest US facility behind its Mountain View, California, headquarters and New York City office.[4] Engineering for Google AdWords is based in Mountain View, California.

 AdWords featuresIP address exclusionIn addition to controlling ad placements through methods such as location and language targeting, ad targeting can be refined with Internet Protocol (IP) address exclusion. This feature enables advertisers to specify IP address ranges where they don't want their ads to appear.Up to 100 IP addresses, or ranges of addresses, can be excluded per campaign. All ads in the campaign are prevented from showing for users with the IP addresses specified.Location-based exclusion is also offered as a method of narrowing targeted users.[5]Frequency cappingFrequency capping limits the number of times ads appear to the same unique user on the Google Content Network. It doesn't apply to the Search Network. If frequency capping is enabled for a campaign, a limit must be specified as to the number of impressions allowed per day, week, or month for an individual user. The cap can be configured to apply to each ad, ad group, or campaign.[6]
Placement-targeted advertisements (formerly Site-Targeted Advertisements)

In 2003 Google introduced site-targeted advertising. Using the AdWords control panel, advertisers can enter keywords, domain names, topics, and demographic targeting preferences, and Google places the ads on what they see as relevant sites within their content network. If domain names are targeted, Google also provides a list of related sites for placement. Advertisers may bid on a cost-per-impression (CPM) or cost-per-click (CPC) basis for site targeting.[7]

With placement targeting, it is possible for an ad to take up the entire ad block rather than have the ad block split into 2 to 4 ads, resulting in higher visibility for the advertiser.

The minimum cost-per-thousand impressions bid for placement-targeted campaigns is 25 cents. There is no minimum CPC bid, however.
AdWords distribution


All AdWords ads are eligible to be shown on www.google.com. Advertisers also have the option of enabling their ads to show on Google's partner networks. The "search network" includes AOL search, Ask.com, and Netscape. Like www.google.com, these search engines show AdWords ads in response to user searches, but do not affect quality score.

The "Google Display Network" (formerly referred to as the "content network") shows AdWords ads on sites that are not search engines. These content network sites are those that use AdSense and DoubleClick, the other side of the Google advertising model. AdSense is used by website owners who wish to make money by displaying ads on their websites. Click through rates on the display network are typically much lower than those on the search network and are therefore ignored when calculating an advertiser's quality score.

Google automatically determines the subject of pages and displays relevant ads based on the advertisers' keyword lists. AdSense publishers may select channels to help direct Google's ad placements on their pages, to increase performance of their ad units. There are many different types of ads that can run across Google's network, including text ads, image ads (banner ads), mobile text ads, and in-page video ads.

Google AdWords' main competitors are Yahoo! Search Marketing and Microsoft adCenter.

In 2010, Yahoo formed a partnership with Microsoft, giving Microsoft the control over powering the Yahoo search marketing ads. Both accounts are now run through Microsoft AdCenter. When ads are displayed on Yahoo now, it is powered by Microsoft AdCenter and is run through the Microsoft software interface.
AdWords account management

To help clients with the complexity of building and managing AdWords accounts search engine marketing agencies and consultants offer account management as a business service. This has allowed organizations without advertising expertise to reach a global, online audience. Google has started the Google Advertising Professionals program to certify agencies and consultants who have met specific qualifications and passed an exam.[8] Google also provides account management software, called AdWords Editor.

Correct choice of keywords is very important because the targeting of ads by Google is totally dependent upon the keyword selection. Keyword choice is also a very large factor in determining the level of exposure the Google ad receives, and to a large extent, who sees the ad.

Another useful feature is the My Client Center available to Google Professionals (even if not yet passed the exam or budget parameters) whereby a Google professional has access and a dashboard summary of several accounts and can move between those accounts without logging in to each account.

The Google Adwords Keyword Tool provides a list of related keywords for a specific website or keyword.[9]
 Google Click-to-Call

Google Click-to-Call was a service provided by Google which allows users to call advertisers from Google search results pages. Users enter their phone number, Google calls them back and connects to the advertiser. Calling charges are paid by Google. It was discontinued in 2007.[10] For some time similar click-to-call functionality was available for results in Google Maps. In the Froyo release of Google's Android operating system, in certain advertisements, there is a very similar functionality, where a user can easily call an advertiser.
 History

 This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2011)


The original idea was invented by Bill Gross of Idealab who, in turn, borrowed the idea from the model of the Yellow Pages. Google wanted to buy the idea but a deal could not be reached.[citation needed] Not wanting to give up on this form of advertisement, the company launched its own solution, AdWords in 2000.[11] AdWords followed a model that was significantly similar to Bill Gross' creation which led to legal action between the two parties. Eventually the dispute was settled out of court.[citation needed]

At first AdWords advertisers would pay a monthly amount, and Google would then set up and manage their campaign. To accommodate small businesses and those who wanted to manage their own campaigns, Google soon introduced the AdWords self-service portal. Starting in 2005 Google provided a campaign management service called Jumpstart.[12] Google's Jumpstart program offers free telephone support from a Google specialist to help users start their online advertising campaign.[13]

In 2005, Google launched the Google Advertising Professional (GAP) Program to certify individuals and companies who completed AdWords training and passed an exam. Due to the complexity of AdWords and the amount of money at stake, some advertisers hire a consultant to manage their campaigns.

In 2008, Google launched the Google Online Marketing Challenge (http://www.google.com/onlinechallenge/), an in-class academic exercise for tertiary students.[14] Over 8,000 students from 47 countries participated in the 2008 Challenge, over 10,000 students from 58 countries took part in 2009, about 12,000 students in 2010 and almost 15,000 students from 70 countries in 2011. The Challenge runs annually, roughly from January to June. Registration is at the instructor rather than student level.

In 2009, Google revised the AdWords interface, introduced Local Business Ads for Google Maps and Video Ads.
 Legal context

AdWords has generated lawsuits in the area of trademark law (see Google, Inc. v. Am. Blind & Wallpaper Factory and Rescuecom Corp. v. Google Inc.), fraud (see Goddard v. Google, Inc.), and click fraud. In 2006, Google settled a click fraud lawsuit for US$90 million.[15]

Overture Services, Inc. sued Google for patent infringement in April 2002 in relation to the AdWords service. Following Yahoo!'s acquisition of Overture, the suit was settled in 2004 with Google agreeing to issue 2.7 million shares of common stock to Yahoo! in exchange for a perpetual license under the patent.[16]
[edit] Technology

The AdWords system was initially implemented on top of the MySQL database engine. After the system had been launched, management decided to use Oracle instead. The system became much slower, so eventually it was returned to MySQL [2]. The interface has also been revamped to offer better work flow with additional new features, such as Spreadsheet Editing, Search Query Reports, and better conversion metrics.
 Ad content restrictions

As of April 2008 Google AdWords no longer allows for the display URL to deviate from that of the destination URL. Prior to its introduction, Google paid advertisements could feature different landing page URLs to that of what was being displayed on the search network. Google expounds that the policy change stems from both user and advertiser feedback. The concern prompting the restriction change is believed to be the premise on which users clicked advertisements. Users were in some cases, being misled and further targeted by AdWords advertisers.[17]

As of December 2010 Google AdWords has decreased its restrictions over sales of Hard Alcohol.[18] It now allows ads that promote the sale of hard alcohol and liquor. This is an extension of a policy change that was made in December 2008, which permitted ads that promote the branding of hard alcohol and liquor.
 Allowed keywords

Google has also come under fire for allowing AdWords advertisers to bid on trademarked keywords.[19] In 2004, Google started allowing advertisers to bid on a wide variety of search terms in the US and Canada, including the trademarks of their competitors[20] and in May 2008 expanded this policy to the UK and Ireland. Advertisers are restricted from using other companies' trademarks in their advertisement text if the trademark has been registered with Advertising Legal Support team. Google does, however, require certification to run regulated keywords, such as those related to pharmaceuticals keywords, and some keywords, such as those related to hacking, are not allowed at all. These restrictions may vary by location.[21] From June 2007, Google banned AdWords adverts for student essay writing services, a move which was welcomed by universities.
Google has other restrictions, for example the advertising of a book related to Facebook was restricted from advertising on AdWords because it contained the word "Facebook" in its title — the rationale being that it was prohibited from advertising a book which used a trademarked name in its title.
source: www.wikipedia.org

marți, 17 aprilie 2012

Domains Yahoo



Yahoo! este un portal și motor de căutare, considerat a fi fost primul motor de căutare performant. În prezent, oferă unele dintre cele mai populare servicii online, toate bazate pe un cont unic: un serviciu de e-mail (Yahoo! Mail), având spațiu de stocare nelimitat, un program de conversație pe internet (Yahoo! Messenger), știri (Yahoo! News), călătorii (Yahoo! Travel) și multe altele.
Yahoo! a fost la început denumit „Ghidul lui Jerry și David despre rețeaua mondială de calculatoare”. Numele Yahoo! provine de la expresia: „Yet Another Hierarchical Officious Oracle”.

Servicii și site-uri deținute de Yahoo!

Yahoo! 360° este un site unde utilizatorii își pot crea pagini personale și blog-uri. De când s-a lansat pe 29 martie 2005, a adunat peste două milioane de membrii. Acesta era doar pe bază de invitație până pe 24 iunie 2005 iar în mod curent este disponibil pentru persoanele cu vârsta peste 13 ani.
Yahoo! Advertising este o combinație de servicii de publicitate deținute de Yahoo!.
Yahoo! Answers este un serviciu unde utilizatorii pun întrebări și răspund la întrebările celorlați. Utilizatorii „sunt plătiți” și „plătesc” puncte. Pentru a pune întrebări, se „plătesc” 5 puncte iar pentru a răspunde la întrebări utilizatorului i se dau 2 puncte. Serviciul era cunoscut înainte sub numele de Yahoo! Ask.
Yahoo! Avatars permite utilizatorilor să creeze personaje care să îi reprezinte, numite avatare, care pot fi afișate pe Yahoo! Messenger și pe profilul Yahoo! 360° al utilizatorului.
Yahoo! Autos permite utilizatorului să cumpere automobile noi și folosite.
Yahoo! Assistant este un obiect ajutător pentru Internet Explorer. A fost creat de Beijing 3721 Technology și numit 3721 Assistant, dar a fost redenumit Yahoo! Assistant după ce Yahoo! a achiziționat Beijing 3721 Technology.
Yahoo! Briefcase este un serviciu de stocare de fișiere gratuit.
Yahoo! Buzz Log reține și analizează căutările efectuate prin Yahoo! Search și le actualizează săpătămânal.
Yahoo! Developer Network oferă resurse pentru producătorii de software care folosesc site-uri și servicii Yahoo!
Yahoo! a fost la început un director web. După ce acesta s-a extins, această secțiune a devenit Yahoo! Directory.
Yahoo! Finance oferă informații financiare.
Yahoo! Gallery este un director de aplicații făcute folosind tehnologii Yahoo!.
Yahoo! Games permite utilizatorilor să joace jocuri online cum ar fi șah și table , against each other. Utilizatorii pot intra în multele camere și pot căuta utilizatori cu care vor să se dueleze. Majoritatea jocurilor sunt applet-uri Java, pe când altele necesită descărcare. Când Yahoo! a achiziționat ClassicGames.com în 1997, acesta a devenit serviciu Yahoo!
Yahoo! GeoCities este un serviciu de stocare a paginilor web ce oferă 15 MO. S-a format la sfârșitul anului 1994 ca Beverly Hills Internet și a fost achiziționat de Yahoo! în 1999 .
Yahoo! Groups este un serviciu gratuit de grupuri și liste de e-mail-uri. S-a format atunci când Yahoo! a achiziționat eGroups.
  • Yahoo! Local
Yahoo! Local este capabil să caute slujbe locale și să le afișeze pe o hartă.
Yahoo! a achiziționat Four11 pe 8 octombrie 1997 și serviciul său de poștă electronică prin internet, Rocketmail a devenit Yahoo! Mail. Spațiul de stocare este nelimitat.
Yahoo! Maps oferă informații din trafic și hărți.
Yahoo! Messenger este un serviciu de mesagerie instant lansat de Yahoo! în 1999. Facilitățile lui cuprind „IMvironement”, mesaje de stare particularizate, plug-in-uri și altele.
Yahoo! Mobile este un site pentru telefoanele mobile folosit predominant în Marea Britanie. Oferă descărcări cum ar fi tonuri de apel.
Yahoo! Movies oferă filme, informații despre filme și altele.
Yahoo! Music oferă videoclipuri muzicale și radio prin internet (LAUNCHcast), un serviciu gratuit cunoscut și sub numele de Yahoo! Music Unlimited.
  • Yahoo! News oferă actualizări de știri și povești de top de la Yahoo News,inclusiv internațional,național,afaceri,divertisment,sport,meteo,tehnologie și știri ciudate.
Yahoo! Photos este un serviciu de partajare a fotografiilor similar cu Flickr, care este, de asemenea deținut de Yahoo!. Utilizatorii au un spațiu nelimitat de stocare dar sunt acceptate numai fotografiile JPG. Yahoo! Photos se închide pe 20 septembrie 2007 pentru a se axa pe Flickr.
Yahoo! Search este un motor de căutare performant.
Yahoo! Shopping permite utilizatorului să caute, să compare și să cumpere produse pe internet.
Yahoo! Sports oferă știri din sport incluzând scoruri și statistici.
Yahoo! Tech oferă sfaturi pentru cumpărarea și utilizarea electronicelor.
Yahoo! Travel oferă ghiduri de călătorie.
Yahoo! TV orare TV dar și înregistrări.
Yahoo! Video este un site pentru partajarea filmelor.
Yahoo! Widgets este un sistem de accesorii ce rulează pe toate atât pe Windows cât și pe distribuțiile de Linux. Era cunoscut sub numele de Konfabulator înainte ca Yahoo! să îl cumpere.
Yahoo! Kids este versiunea pentru copii a portalului Yahoo!
Bix este un site de concursuri achiziționat de Yahoo în 2006.

blo.gs este un director de blog-uri actualizate recent cumpărat de Yahoo în, iunie 2005.
Dialpad a fost o companie de telefonie, devenită Yahoo! Voice.

Source: www.wikipedia.org


Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes most peer-reviewed online journals of Europe and America's largest scholarly publishers, plus scholarly books other non-peer reviewed journals. It is similar in function to the freely available Scirus from Elsevier,CiteSeerX, and getCITED. It is also similar to the subscription-based tools, Elsevier's Scopus and Thomson ISI'sWeb of Science. Its advertising slogan — "Stand on the shoulders of giants" — is a nod to the scholars who have contributed to their fields over the centuries, providing the foundation for new intellectual achievements.
Google Scholar arose out of a discussion between Alex Verstak and Anurag Acharya,[1] both of whom were then working on building Google's main web index.

History

In 2006, in response to release of Microsoft's Windows Live Academic Search, a potential competitor for Google Scholar, a citation importing feature was implemented using bibliography managers (such as RefWorksRefManEndNote, and BibTeX). Similar features are also part of other search engines, such as CiteSeer and Scirus.
In 2007, Acharya announced that Google Scholar had started a program to digitize and host journal articles in agreement with their publishers, an effort separate fromGoogle Books, whose scans of older journals do not include the metadata required for identifying specific articles in specific issues.[4]
In 2011, Google removed Scholar from the toolbars on its search pages, making it both less easily accessible and invisible to users who were not already aware of its existence.


Features and specifications

Google Scholar allows users to search for digital or physical copies of articles, whether online or in libraries.[5] “Scholarly” searches will appear using the references from “’full-text journal articles, technical reports, preprints, theses, books, and other documents, including selected Web pages that are deemed to be “scholarly.’”[6]Because most of Google Scholar's search results link directly to commercial journal articles, a majority of the time users will only be able to access a brief summary of the articles topics, as well as small amounts of important information regarding the article, and possibly have to pay a fee to access the entire article.[6] Google Scholar is as easy to use as with the regular Google web search, especially with the helpfulness of the "advanced search" option, which can automatically narrow search results to a specific journal or article.[7] The most relevant results for the searched keywords will be listed first, in order of the author's ranking, the number of references that are linked to it and their relevance to other scholarly literature, and the ranking of the publication that the journal appears in.[8]
Using its "group of" feature, it shows the available links to journal articles. In the 2005 version, this feature provided a link to both subscription-access versions of an article and to free full-text versions of articles; for most of 2006, it provided links to only the publishers' versions. Since December 2006, it has provided links to both published versions and major open access repositories, but still does not cover those posted on individual faculty web pages;[citation needed] access to such self-archived non-subscription versions is now provided by a link to Google, where one can find such open access articles.
Through its "cited by" feature, Google Scholar provides access to abstracts of articles that have cited the article being viewed.[9] It is this feature in particular that provides the citation indexing previously only found in Scopus and Web of Knowledge. Through its "Related articles" feature, Google Scholar presents a list of closely related articles, ranked primarily by how similar these articles are to the original result, but also taking into account the relevance of each paper.[10]
As of March 2012, Google Scholar is not yet available to the Google AJAX API.
Google Scholar’s legal database of US cases is extensive. Users can search and read published opinions of US state appellate and supreme court cases since 1950, US federal district, appellate, tax and bankruptcy courts since 1923 and US Supreme Court cases since 1791.[9] Google Scholar embeds clickable citation links within the case and the How Cited tab allows lawyers to research prior case law and the subsequent citations to the court decision.[11] The Google Scholar Legal Content Star Paginator extension inserts Westlaw and LexisNexis style page numbers in line with the text of the case.[12]

Ranking algorithm

While most academic databases and search engines allow users to select one factor (e.g. relevance, citation counts, or publication date) to rank results, Google Scholar ranks results with a combined ranking algorithm in a "way researchers do, weighing the full text of each article, the author, the publication in which the article appears, and how often the piece has been cited in other scholarly literature".[8] Research has shown that Google Scholar puts high weight especially on citation counts[13] and words included in a document's title.[14] As a consequence the first search results are often highly cited articles.


Limitations and criticism

Use of Google Scholar does not automatically grant searchers access to publications available through subscription sites. The full texts of articles in Google Scholar are not necessarily available freely to all searchers, though searchers with access through an institution such as a research laboratory or university may be able to access select articles freely. Some articles found through Google Scholar are hosted by sites that allow searchers to subscribe or purchase the full text of their articles.
Some searchers consider Google Scholar of comparable quality and utility to commercial databases,[15][16] even though its user interface (UI) is still in beta. The reviews recognize that its "cited by" feature in particular poses serious competition to Scopus and ISI Web of Knowledge, although, in a study limited to the biomedical field, the citation information found in Google Scholar have found to be sometimes inadequate, and less often updated.[17] Another important issue is that the relative coverage of Google Scholar varies by discipline compared to other general databases. [18]
A significant problem with Google Scholar is the secrecy about its coverage.[editorializing] Some publishers do not allow it to crawl their journals. Elsevier journals were not included before mid-2007, when Elsevier began to make most of its ScienceDirect content available to Google Scholar and Google's web search.[19] As of February 2008 the absentees still included the most recent years of the American Chemical Society journals. Google Scholar does not publish a list of scientific journals crawled, and the frequency of its updates is unknown. It is therefore impossible to know how current or exhaustive searches are in Google Scholar. Nonetheless, it allows easy access to published articles without the difficulties encountered in some of the most expensive commercial databases[20].
Google Scholar puts high weight on citation counts in its ranking algorithm and therefore is being criticised for strengthening the Matthew effect[13]; as highly cited papers appear in top positions they gain more citations while new papers hardly appear in top positions and therefore get less attention by the users of Google Scholar and hence fewer citations.
Google Scholar has problems identifying publications on the arXiv preprint server correctly. Interpunctuation characters in titles produce wrong search results, and authors are assigned to wrong papers, which leads to erroneous additional search results. Some search results are even given without any comprehensible reason.[21][22]
Google Scholar is vulnerable to spam.[23] Researchers from the University of California, Berkeley and Otto-von-Guericke University Magdeburg demonstrated that citation counts on Google Scholar can be manipulated and complete non-sense articles created with SCIgen were indexed from Google Scholar.[24] They concluded that citation counts from Google Scholar should only be used with care especially when used to calculate performance metrics such as the h-index or impact factor. Although Google Scholar does not compute the h-index itself, several downstream web sites use its data. The practicality of manipulating h-index calculators byspoofing Google Scholar was demonstrated in 2010 by Cyril Labbe from Joseph Fourier University, who managed to rank "Ike Antkare" ahead of Albert Einstein by means of a large set of SCIgen-produced documents citing each other (effectively an academic link farm).[25]
Google Scholar is also not able to shepardize case law, as Westlaw and Lexis can.
Google Scholar url: http://scholar.google.com
source: www.wikipedia.org