by Richard Ball - Search Engine Guide - The target audience for search ads and content ads (contextual ads) can be quite different. Let's call them searchers (active) and browsers (passive), respectively. Searchers are actively typing the keywords you are bidding on. Browsers, who see your ad triggered by a contextual advertising system, are more passive in the sense that they didn't type specific keywords into a search box. Link to Article





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Search Engine Marketing Columnist