Posters, in the form of placards and posted bills, have been used since earliest times, primarily for advertising and announcements, textual posters, posters, printing techniques, production and printing, including notably the technique lithography. The invention of lithography was soon followed by chromolithography, which allowed for mass editions of posters illustrated in vibrant colors to be printed.
Tuesday, September 2, 2008
Contextual advertising
Contextual advertising is a form of targeted advertising for advertisements appearing on websites or other media, such as content displayed in mobile browsers. The advertisements themselves are selected and served by automated systems based on the content displayed to the user.
HOW IT WORKS?
Contextual advertising is targeted to the specific individual visiting a website (or page within a website). A contextual advertising system scans the text of a website for keywords and returns advertisements to the webpage based on what the user is viewing. The advertisements may be displayed on the webpage or as pop-up ads. For example, if the user is viewing a website pertaining to sports and that website uses contextual advertising, the user may see advertisements for sports-related companies, such as memorabilia dealers or ticket sellers. Contextual advertising is also used by search engines to display advertisements on their search results pages based on the keywords in the user's query.
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