The foundation of PageRank is counting incoming links to a website. Linking from your website to another website is largely a human decision and PageRank aggregates all these decisions across the Web.
You can either optimize a search engine for a specific vertical or you can try to build features that generalize across the Web no matter the existing verticals or future ones.
While Google is certainly looking at the problem as an algorithmic one, it very much relies on human input to decide what is important and relevant.
You can either optimize a search engine for a specific vertical or you can try to build features that generalize across the Web no matter the existing verticals or future ones.
While Google is certainly looking at the problem as an algorithmic one, it very much relies on human input to decide what is important and relevant.