Is Googles ongoing approach to personalization wreaking havoc with advertisers quality score? This post is a rundown of some serious PPC relevancy and matching issues encountered when entering concurrent search queries. If this is the result of a more aggressive approach to personalization has Google unwittingly sacrificed relevance to trial new matching technology or is this a bug?
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Personalized Google Ads: Previous Searches Influence Ads You See, http://sphinn.com/story/953, covers whats going on. Its a way theyre personalizing ads.