| stop words | Usually refer to the most common words in a language and are normally filtered out in queries by search engines. Can be similarly filtered out from webpages when being ranked or indexed. |
| 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 |
| quality score | Quality score is Googles measurement for the quality of an ad and is based on a handful of factors, including: expected click through rate from the SERP, the relevance of the ad to the keyword, relevance of the landing page to the ad and keyword |
| google sitemaps | A file where you list web pages, media, and other files available on your site to help search engines crawl and index your web resources better. |
| yahoo! directory | A long-standing, authoritative web directory. Yahoo! Directory does offer paid inclusion to qualified websites. |
