| null relevance | Noun phrase. The complete lack of internal or external factors that create a positive relevance score for a document in a search result in which the document is listed. |
| crawl frequency | how often a website is crawled by the Google Spiders. Well trusted and frequently updated websites may be crawled more often. |
| spam referral | Traffic to a website via bots and not from users. Spam traffic typically gets tracked as referral traffic in Google Analytics as the websites doing the spamming are doing it for lead generation as curious website owners want to know the source of all their new website traffic. Too much spam traffic can misinterpret changes in website traffic. |
| minification | To minify something means to remove as many unnecessary characters from the source code as possible without altering functionality. Whereas compression makes something smaller, minification actually removes things. |
| web 2.0 | Web 2.0, also known as social web, was a progressive movement in which world wide web websites began to encourage user-generated content and participative interaction. |
