| crawling | The process by which search engines discover your web pages. |
| topical trust flow | Topical Trust Flow is a metric from Majestic that looks at the categorization of links pointing to a website or URL. |
| trustrank | A link analysis technique used to separate good “reputable seed pages” from web spam. |
| z-index | This is a property of CSS that lets you have better control positioning elements that overlap. It is used sometimes for Black Hat SEO. |
| rank checker tool | A tool that provides data regarding a sites positions on search engine results for particular queries. |
