A patent application describes what Google and (Bill Slawski) call "plusbox," a feature in queries that enables the search engine to return more results hidden in a link. He tells us why Google might want to present results this way and the technology behind the feature. The patent tells us Google might show two or more results based on numerous factors. Slawski includes a list of those factors, why each are important, and how they link to personalized search.
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