A unique identification data file saved to users’ web browsers for tracking purposes. Cookies can be used to personalize user experiences, track conversions, and remarketing to past site visitors.

The main page of a website through which users can navigate the rest of a site.

Website configuration file that can be used to establish redirects and password protect files.

Status OK. The page or image was found and successfully loaded.

The server code for a permanent redirect. A file or site has been permanently moved to a new location. SEO best-practice.

The server code for a temporary redirect.

"Not Found" server code. Custom 404 pages can improve usability.

Testing two different versions of a website, advertisement, or other campaign against one another to determine which performs better. Also known as split testing.

Testing two different versions of a website, advertisement, or other campaign against one another to determine which performs better. Also known as split testing.

Historically used to describe the content printed above the centerfold of a newspaper. Online, it refers to all content that is viewable without having to scroll down.