Find out where other sites get backlinks from using SEO SpyGlass: a #1 SEO backlink tool for enterprises & individuals. Check backlink sources' quality & build your own links using only the most promising ones. 50+ backlink factors to analyze links for. Find out the number of likes and shares each of the backlink pages has. Scan the Internet for poor links leading to your site and disavow them before they impact your site's rankings negatively.