13 Mar, 2009  |  Written by Frank Carver  |  under Information

Recently, Google has contacted site publishers to inform them of a change in the way google ads are targeted. User activity will now be recorded and categorized, and used to select and prioritize which ads are displayed.

The interesting part of the announcement for me is not that Google are doing this, it’s a natural step, but that they seem to be using some sort of fixed ontology to classify ads and characterize users. General wisdom is that this is considerably less flexible than a looser “folksonomy” approach.

Either way, it will be interesting to see how this pans out, and whether Google can manage to grow its already huge advertising income even more.

Read more at Interest-based advertising – AdSense Help.