A reciprocal link is when a web site links to you

Always check out the potential link partner's web site and the page that your link is going to be placed on.Five essential rules to follow when choosing a link partner.
Make sure that the website is related to yours.
You can tell a page is a link farm by the fact that there's usually no company logo.
If the web site or link page is of poor quality.
Ensure your link will be found by search engines. Make sure the links point straight to other sites and are not redirected or use JavaScript linking code.