If you're at all interested in getting users to click on links to your site, then you need to make the url relevant. All the discussion of unique ids and other

If you're at all interested in getting users to click on links to your site, then you need to make the url relevant. All the discussion of unique ids and other parts is for technical types who want to split definitions. If you are after traffic, whether, search, referral or text advertising (adwords) then you'll want a short, concise Url that closely matches what the searcher wants. Click through rates for adwords where the url matches the search term can be twice as high as when they don't match. Rightly or wrongly, the average internet user equates the Url as a strong indicator of the content on a page. Google follows what people do, so they weight it highly as well. Want traffic? Short human readable Urls you need.