This week Google added their “+1″ button to AdWords text ads. +1 is the Google version of Facebook’s “Like” concept.  The idea behind +1 for AdWords ads is to improve ad relevancy through collaborative filtering. For advertisers, the benefit is allegedly that this will help bring more relevant users. To quote the Google announcement directly: We expect that personalized annotations will help users know when your ads and organic search results are relevant to them, increasing the chances that they’ll end up on your site. You don’t have … Continue reading →