| e com | These types of web sites are those devoted solely to retail sales. |
| hidden content | Hidden content is content that exists in the HTML version of the page, but isnt directly visible in the browser. Although not always the case, its often used as a black hat SEO tactic, to add extra content that only the search engines will see. |
| robots meta tag | The Robots meta tag can contain one or more comma separated values which instruct search engines as to how a resource should be indexed and/or its links crawled. Possible values include Noindex, Nofollow and Noarchive. Index, Follow is the default value so does not need to be expressed. |
| xenu link sleuth | free software used to check for broken or external links, and creating sitemaps. |
| ffa | FFA stands for Free for all and refers to websites that allow anyone to add a link pointing to their pages. FFA pages have no human intervention and usually they dont weight much in search relevancy as they usually point to low quality website. For example, on an FFA page you can find a sport site listed between art museums and spatial engineering. |
