When we were building our site, we were quite illiterate about SEO, and are now correcting lots of mistakes, but there is one thing we did that I am not sure if it is necessary to change. Each of our categories has at least 1-2 pages, and at the bottom of each page, we would always name the link to the next page "Go to Page 2", etc, instead of "blue widgets-page 2". We now think that was a big mistake, since that was tons of links that could have had keywords and didn't. We did change the link names to "blue widgets - page 2", but that only changed the link text, and not the page url. The url's for all of them still say "gotopage2.html" etc. My quesion is: how important is it for us to rebuild the pages so that the url's say "bluewidgetspage2.html"?