One of the most basic best practices for search engine optimization is to have external links on the internet that go back to your site. Search engines use these links to determine the relevance and value of your site in their search engine rankings. So when another site on the web links back to you, that tells search engines that your site is important. But be warned, not all external links are created equal.
Here are a few pointers to be sure that your search engine marketing plan uses external links in the most productive way.