Clickable regions on images that make links more visually appealing and Web sites more interesting. Image maps enable spiders to "read" this material.
The number of times someone views a page displaying your ad. Note that this is not the same as actually seeing your ad, making placement and an understanding of the site's traffic particularly important when paying on a Cost per 1,000 Impressions basis.
Inbound or Incoming Links
The collection of information a search engine has that searchers can query against. With crawler-based search engines, the index is typically copies of all the Web pages they have found from crawling the Web. With human-powered directories, the index contains the summaries of all the Web sites that have been categorized.
Any of a number of ways to reach internet users, including Search Engine Marketing, Search Engine Optimization, and Banner advertising.
An ad that appears between two pages a person is trying to view. The ad often appears near a hyperlink allowing someone to quit viewing your ad and go directly to the page he or she originally tried to access.