Pay for placement, or P4P, is an Internet advertising model in which advertisements appear along with relevant search results from a Web search engine. Under this model, advertisers bid for the right to present an advertisement with specific search terms (i.e., keywords) in an open auction. When one of these keywords is entered into the search engine, the results of the auction on that keyword are presented, with higher ranking bids appearing at the top of the page.
When P4P was first introduced, controversy arose because seventy percent of Internet users were unaware that search results could be skewed as a result of such agreements, which in some cases led to legal action. Many users felt that the search results would be irrelevant; however, the auction model has proven to be effective at producing relevant results for searches where the user wants to purchase something. P4P is now seen as the most efficient and effective way to monetize search engines.
Pay Per Click (PPC) is an Internet advertising model used on search engines, advertising networks, and content sites, such as blogs, in which advertisers pay their host only when their ad is clicked. With search engines, advertisers typically bid on keyword phrases relevant to their target market. Content sites commonly charge a fixed price per click rather than use a bidding system.
Websites that utilize PPC ads will display an advertisement when a keyword query matches an advertiser's keyword list, or when a content site displays relevant content. Such advertisements are called sponsored links or sponsored ads, and appear adjacent to or above organic results on search engine results pages, or anywhere a web developer chooses on a content site.
Although many PPC providers exist, Google AdWords, Yahoo! Search Marketing, and Microsoft adCenter are the three largest network operators, and all three operate under a bid-based model. Cost per click (CPC), varies depending on the search engine and the level of competition for a particular keyword.
The PPC advertising model is open to abuse through click fraud, although Google and other search engines have implemented automated systems to guard against abusive clicks by competitors or corrupt web developers.
Commercial advertising media can include wall paintings, billboards, street furniture components, printed flyers and rack cards, radio, cinema and television adverts, web banners, mobile telephone screens, shopping carts, web popups, skywriting, bus stop benches, human billboards, magazines, newspapers, town criers, sides of buses, banners attached to or sides of airplanes ("logojets"), in-flight advertisements on seatback tray tables or overhead storage bins, taxicab doors, roof mounts and passenger screens, musical stage shows, subway platforms and trains, elastic bands on disposable diapers, stickers on apples in supermarkets, shopping cart handles (grabertising), the opening section of streaming audio and video, posters, and the backs of event tickets and supermarket receipts. Any place an "identified" sponsor pays to deliver their message through a medium is advertising.
One way to measure advertising effectiveness is known as Ad Tracking. This advertising research methodology measures shifts in target market perceptions about the brand and product or service. These shifts in perception are plotted against the consumers’ levels of exposure to the company’s advertisements and promotions. The purpose of Ad Tracking is generally to provide a measure of the combined effect of the media weight or spending level, the effectiveness of the media buy or targeting, and the quality of the advertising executions or creative.
Advertising is a form of communication that typically attempts to persuade potential customers to purchase or to consume more of a particular brand of product or service. “While now central to the contemporary global economy and the reproduction of global production networks, it is only quite recently that advertising has been more than a marginal influence on patterns of sales and production. The formation of modern advertising was intimately bound up with the emergence of new forms of monopoly capitalism around the end of the 19th and beginning of the 20th century as one element in corporate strategies to create, organize and where possible control markets, especially for mass produced consumer goods. Mass production necessitated mass consumption, and this in turn required a certain homogenization of consumer tasopetes for final products. At its limit, this involved seeking to create ‘world cultural convergence’, to homogenize consumer tastes and engineer a ‘convergence of lifestyle, culture and behaviors among consumer segments across the world’.
Many advertisements are designed to generate increased consumption of those products and services through the creation and reinvention of the "brand image" . For these purposes, advertisements sometimes embed their persuasive message with factual information. Every major medium is used to deliver these messages, including television, radio, cinema, magazines, newspapers, video games, the Internet, carrier bags and billboards. Advertising is often placed by an advertising agency on behalf of a company or other organization.
Organizations that frequently spend large sums of money on advertising that sells what is not, strictly speaking, a product or service include political parties, interest groups, religious organizations, and military recruiters. Non-profit organizations are not typical advertising clients, and may rely on free modes of persuasion, such as public service announcements.]
Money spent on advertising has increased dramatically in recent years. In 2007, spending on advertising has been estimated at over $150 billion in the United States and $385 billion worldwide, and the latter to exceed $450 billion by 2010.
While advertising can be seen as necessary for economic growth, it is not without social costs. Unsolicited Commercial Email and other forms of spam have become so prevalent as to have become a major nuisance to users of these services, as well as being a financial burden on internet service providers. Advertising is increasingly invading public spaces, such as schools, which some critics argue is a form of child exploitation
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