Yahoo! Site Explorer is an indispensable free tool for exploring a site’s or individual URL’s inbound links. If you’re in the business of buying established websites, then you’ll definitely need a tool for checking inbound links.Why are the inbound links to a website important? Because as well as carrying visitors to a website, they also help that site rank in the search engines. So if you’re buying a website, it helps to get acquainted with that site’s inbound links. They are usually the lifeblood of the site.
I use Yahoo site Explorer to check the number of backlinks that are coming to my site from a different number of sites.