| head term | A popular keyword with high search volume that is usually difficult to rank for. |
| h6 tag | The heading element in HTML defines a structure for headings in a document. Starting with H1 as the most important heading, descending to H6, heading tags have been a standard part of HTML since HTML 2.0. |
| bread crumbs | Bread crumbs refers to links that are usually above the main content. They have two main functions: to allow the user to easily navigate on your site and also search engines to easily determine the structure of your site. An example of how breadcrumbs usually look like is this: Home >On line books >Gone with the wind > Chapter 2 |
| broken links | A broken link is a link to a URL that is not working correctly. If a user were to click the link it would lead to a 404 page or other type of error page in the browser. |
| split testing | A controlled experiment used to compare at least two webpages to measure the effects of a different variable on conversions. After the pages are shown for a long enough period of time to site visitors to gather an adequate amount of performance data, a “winner” can be declared. |
