This test looks at the number of other sites that link to you.
The volume and quality of backlinks to your site is very important. Search engines like Google treat a link to your site as a 'vote,' making it come higher in search rankings. The more relevant the site, the higher weight the vote carries.
The volume of backlinks to a site is also a good measure of the popularity of a site and how well it is marketed online.
Google and Yahoo already hold this information which you can easily access yourself by entering 'link:http://www.YOURSITE.com' into the search box. We score you based on the volume of backlinks.
All link counts vary and this is normal. There are several reasons for this:
Any backlinks to your site are beneficial. Try and get included in directories relevant to your site, or get involved with relevant forums and drop in a mention to your site every now and then (but watch out, it's obvious if you are just spamming to get more back-links and it may backfire if you don't contribute anything useful).