| conceptual links | some of the more advanced search engines are attempting to understand links beyond focusing on the anchor text, for example by using co-citation. |
| outbound links | Links on a particular web page leading to other web pages, whether they are within the same web site or other web sites. |
| blog comment spam | comments that are left on a blog that add no value to the article or discussion, typically including a backlink to an external website. Blog comment spam may be automated by a bot or left manually. |
| quality index | Quality Index is like Yahoos version of Googles Adwords Quality Score. It can affect a users cost per click and ranking. |
| googlebot | How major search engines like Google and Bing crawl the web; their crawlers or spiders. |
