| link churn | The measurement of lost links within a specified time period. |
| universal search injection | Noun phrase. The practice by Universal Search-capable services of augmenting search results (q.v.) with additional, supplemental listings not normally included in the standard 1..10 listings. Universal Search Injection listings usually have more complex structures, provide more information, and are more transient in nature than normal search listings (q.v.). Universal Search Injections may include links to several documents. |
| link sculpting | Link or page rank sculpting is the process of manipulating how page rank flows through your website. Its obsolete, as explained here. |
| website structure | The planning and design of a websites functional, technical, and visual components. |
| h4 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. |