Google Ad Sense allows webmasters to dynamically serve content relevant advertisements on web pages. If the visitor clicks one of the Ad Sense ads served to the website, the website owner is credited for the referral. Google's Ad Sense program essentially allows approved websites to dynamically serve Google's pay-per-click Ad Word results.

Website maintenance related to Ad Sense is very easy and requires very little effort. Webmasters need only to insert a Google generated java script into the web page or website template. Google's spider parses the Ad Serving website and serves ads that relate to the website's content. Google uses a combination of keyword matching and context analysis to determine what ads should be served. The java script calls the ad from Google and will ensure that ads are served each time a visitor goes to the web page.

Early on Google implemented a filtering system that allowed webmasters to prevent a specific domain's ads from being served on any websites in their account. Ad blocking meant that webmasters could prevent their competitor's ads from being dynamically served on their websites.

Google provides a wide variety of ad formats to match the most suitable option with a website. Webmasters can select from a handful of preformatted towers, inline rectangles, banners and buttons. The ad boxes can be modified by webmasters to resemble the website's color scheme. Examples of how different the various text boxes and color schemes appear on similarly themed sites can be viewed at:

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