How well a particular web page or web site is listed in a search engine results. Rank indicates where exactly a specific URL is listed. Overall, saying a page is "listed" only means that it can be found within a search engine in response to a query, not that it necessarily ranks well for that query.

The rank of your web site when a user searches the net using your keywords or keyword phrases.

A link exchange between two sites. A link you place on your web page with the understanding that the linked web page will create a link to your site.

A web page which links to your web site and sends traffic. Some traffic software can show which referral page a specific visitor linked from.

The process of entering personal information through a web site in order to access the particular content that a Web site provides. Users who chose not to provide this information may be denied access to some areas of the site.

The page of results displayed by a search engine when information is requested.

see Crawler.

A file used to keep web pages from being indexed by search engines.

A term describing the calculation of the percentage of profit or revenue generated from a specific activity. The financial return on an Internet marketing or advertising campaign in comparison to the cost of that campaign.