Why Yahoo! is Somewhat Focused on On-The-Page
Yahoo! has a paid inclusion program that allows them to generate revenue from people who join their paid inclusion program. By relying on page content, Yahoo! makes it easier for its paid inclusion members (or other editorially reviewed content participants) to improve their rankings.
While Google's search results seem to be tuned to informational websites, Yahoo!'s algorithms are tuned more toward commercial websites. Google has little information of their own, so they need to make their results as informational as possible to leverage the value created by small, independent publishers to get bigger publishing companies to want to give up more of their content.
Yahoo! is perhaps the single largest content site on the web. They do not mind if their search results are a bit biased toward commercial results because they ideally want people to read, use, and share Yahoo! content.
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