What is Google Adsense?
Google Adsense is an ad placement program administered by Google,
which allows advertisers to set up text, image and video ads on their websites and
measure the return on their ad spend, on a PPC or CPM
basis.
Google uses its search technology to serve ads based on website content, the user's
geographical location, and other factors. 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.