| page views | Page views is a metric that measures how many pages a user visits in a single session on your website. |
| open directory project | (ODP) See DMOZ. One of the oldest and most comprehensive human-reviewed directories on the web. |
| null query | Noun phrase. A null query produces no relevant documents as a search result. Alt. A null query may include only documents with null relevance (q.v.). |
| visibility | The prominence and positions a website occupies within the organic search results. |
| outbound link | A link that directs visitors to a page on a different website than the one they are currently on. |
