What is link Popularity? Link popularity is a general representation of the total number of web pages which link to a website (or individual web page). Most of the major search engines support the "link:" operator. Type in “link:” (without the quotation marks) in front of the URL about which you want to learn. 

Why is link popularity important?. Link popularity is important because it is a major factor used by search engines in determining a site's position in search results. Generally, a site with more inbound links will be positioned higher than a similar site with fewer links. Other factors that are considered include anchor text.

What are outbound links? Outbound links are simply hyperlinks which point to another web page. In fact they are simply regular hyperlinks.

What is anchor text? Anchor text is the text used to display a link, for example: this is anchor text.