By paying people for websites that are built only for getting AdSense payments Google is one of the main sources for the air pollution of the Web. Like Danny Sullivan says:
"This is a program that rewards people not for creating the best content, but for how to create sites to attract more advertising AdSense has nothing to do with search. It effectively turns the Internet into a billboard for Google's ads."
On the other hand what difference does it make if you are creating "best content" or sites as long as you are creative?
The bottom line is that Google educates people to be creative, to be survivors, not to be educated, and that's fine with me.
Here's MyMicroPedia about the term AdSense:
AdSense is an advertising program run by Google. Website owners can enroll in this program to enable text and image advertisements on their sites. These ads are administered by Google and generate revenue on a per-click basis.
Those wanting to advertise with Google's targeted ad system may sign up through AdWords. AdSense has become a popular method of placing advertising on a website because the ads are less intrusive than most banners, and the content of the ads is often relevant to the website.
Many sites use AdSense to monetize their content and some webmasters work hard to maximize their own AdSense income.
They build valuable content on their sites; content which attracts AdSense ads and which pay out the most when they get clicked.
They use copy on their websites that encourage clicks on Ads. Note that Google prohibits people from using phrases like "Click on my AdSense ads" to increase click rates. Phrases accepted are "Sponsored Links" and "Advertisements".
The source of all AdSense income is the AdWords program which in turn has a complex pricing model based on a Vickrey second price auction, in that it commands an advertiser to submit a sealed bid (not observable by competitors).Additionally, for any given click received, advertisers only pay one bid increment above the second-highest bid.
In May 2005, Google unveiled AdSense for feeds, a version of AdSense than runs on RSS and Atom feeds that have more than 100 active subscribers. According to the Google Blog, "advertisers have their ads placed in the most appropriate feed articles; publishers are paid for their original content; readers see relevant advertising and in the long run, more quality feeds to choose from".
Some webmasters create sites tailored to lure searchers from Google and other engines onto their AdSense to make money from clicks. These "zombie" sites often contain nothing but a large amount of interconnected, automated content (e.g. a directory with content from the Open Directory Project). Possibly the most popular form of such "AdSense farms" are splogs ("spam blogs"), which are centered around known high-paying keywords. These and related approaches are considered to be search engine spam and can be reported to Google.
Google also provides other related services that are not directly related to searching. These include their AdSense and AdWords targeted text advertising services, Gmail, Blogger web-logging service and Google Web Portal a beta web service similar to My Yahoo.
A to Z Home's Cool A portal for homeschooling, with consumer information from an AdSense-supported website run by a Californian woman
Google has also attempted to create a network effect in its advertising business with its Google AdSense service. Google AdSense places ads on many small sites, such as blogs, using Google technology to determine which ads are relevant to which blogs. Thus, the service appears to aim to serve as an exchange (or ad network) for matching many advertisers with many small sites (such as blogs). In general, the more blogs Google AdSense can reach, the more advertisers it will attract, making it the most attractive option for more blogs, and so on, making the network more valuable for all participants.
The Hurl, an AdSense-supported personal website with a community forum
Articles on medieval trebuchets, an AdSense-supported personal website
Songs and music featured in ER, a fan's AdSense-supported websites: ER (serija)