We understand that increased ad relevance contributes to a positive experience for users, publishers, and advertisers, so were continuously working on ways to improve the relevance and quality of ads that appear on your sites.

The changes will not affect how other types of ads are matched to your sites. Placementtargeted ads that advertisers bid on to appear specifically on your page, for example, will continue to appear. These relevancydetermining changes are not the only thing the AdSense team has been up to. This week, they announced that they have tweaked the default fonts for different ad formats, in order to trigger better performance. Category filtering was also announced for AdSense for Feeds.