One of the benefits to using AdSense on your website, besides the monetization potential, is its unique way of helping you to optimize your website. So AdSense is all about monetization and optimization. This is particularly true since Google just rolled out its new advertising policy, called interest-based advertising.
So what is interest-based advertising?
Glad you asked. Google has started to collect information on sites that users visit and drops cookies on their computers to get a better understanding of the types of sites each user likes to visit. Users can opt out of this program, but those who do not are telling Google what types of sites they like to visit. No other information identifying the individual is collected. The cookie simply identifies the computer and its users’ preferences so if more than one user has access to a particular IP address then several preferences will be logged.
That aside aside, however, the benefit to publishers is that ads unique to individual users can now appear when those visitors show up on your site. That could mean that visitors are seeing ads not relevant to the information on your site. So how does that equate to better on site search engine optimization?
You will still be able to see which of your pages, and which of your ad placements, is making you the most money on click throughs and earnings. Google will still attempt to match ads based on your content, but the assumption is that users tend to visit websites that are at least someone alike in content. But the ads that are shown on your site could end up being a better fit for monetization efforts and you can still use that information to tell which of your web pages are best optimized for the traffic that is making you money.