Many websites include a section or two with the “Ads by Google” above it or below it. These are ads displayed via Google’s AdSense. When you do a search on Google and see ads in the search results pages, they are generally AdSense ads.
AdSense – The Yin:
Google’s AdSense is programming that “senses” the content of a page or search. It finds keywords on a web page or in a search phrase to determine the subject of the content. It does this by either “reading” the page, or taking a look at the search term that was typed into Google Search. It can “Sense” which ads in the system are relevant to the content or search and display them – thus: “AdSense.”
Before ads on a page are displayed, AdSense searches its database of advertisers and finds ads that are associated with keywords on the page or in the search. Now AdSense needs to decide which of the thousands of ads vying for position are actually displayed. To make this decision, AsSense looks at the advertiser’s bids for the relevant keywords. The advertisers that have a combination of the highest bid, keyword...