Also known as the Open Directory Project, this continually expanding directory is run by volunteers. It claims to be the largest (and is one of the most famous) of the human-edited directories.

Any text, image, video, audio, app or other material published on the Internet for audience consumption.

See “pay-per-click.”

An acronym for “search engine results page,” displayed after a query is entered on a search engine.

A leading blog search engine that aggregates blog content and scores blogs’ popularity or influence.

This complex term covers many dimensions of the contemporary Web, including quick user access to streaming video, audio, images and other popular content. It can be generally used to describe interact [..]

This symbol represents a tag for categorization on Twitter. See “hashtag.”

Code meaning “moved permanently,” used to point browsers, spiders, etc. to the correct location of a missing or renamed URL. Pages marked with such a code will automatically redirect to another URL. [..]

See “bounce rate.”

Refers to the point in time when a visitor to a website becomes a qualified lead or customer.