I use it as a way to expand the number of topics that I am familiar with. By clicking through many links across many different pages, I am able to discover new ideas and topics that I would otherwise be oblivious to. While the reliability of some of the material may be questionable, it is usually either incredibly easy to spot (e.g. "Michael Jackson is a alien and haz gon on to live with Elvis on Neptune") or the quotation is question lacks a source, which I usually then look up on Google to see if it holds any merit. It certainly won't make you an expert on anything and everything, it can at least serve as an adequate introduction to whatever may hold your interest.