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description tag - An HTML meta tag used to provide a description of a webpage for search engine listings. Most search engines display the description tag within their results to provide the user with an overview of what the site is about.

directory - An organized, menu-based listing of websites. Sites are typically added to directories by human review rather than search engine algorithms.

domain name - The virtual address of a website (in the form www.organizationname.com, .net, .edu, .gov, etc.)

email marketing - Promotion of products or services via email

e-media - Placement of online marketing tactics, including online advertisements, targeted email, e-newsletter sponsorships, etc.

e-newsletter - An email with editorial content, sent to a list of subscribers who have opted in to receive educational content on a particular topic

flash - Vector-based multimedia technology developed by Macromedia that enables the development of complicated animation and interactivity within a relatively small file size

frames - A website layout used to combine two or more separate HTML documents within a single web browser screen. A framed website often causes problems for search engines, and may not be indexed correctly.

Google - One of the leading search engines, estimated to have indexed about 8.8 billion webpages

HTML - HyperText Markup Language - The main language used to create information on the Internet. Web browsers display the webpages that HTML code describes.

impression - One human view of an advertising unit or webpage

indexed pages - Webpages that have been read by a search engine's spider and included in its database of search results

interactive marketing - Promotion of products or services using online tactics such as online advertising, targeted email, e-newsletter sponsorships, etc.

Interactive Solution Center^TM - A 90octane marketing microsite specifically designed to convert prospects to qualified leads and capture success metrics tailored to the advertiser's lead generation program

Javascript - A programming language used to create dynamic functionality on webpages

keyword/keyphrase - A word or phrase used to perform a search query

keyword density - The prevalence of a keyword or keyphrase on a webpage in relation to all content on the page, calculated as the number of instances of the term divided by the instances of all words on the page

keywords tag - HTML meta tag placed on a webpage to inform search engines which keywords are important to the page's target audience. The keywords tag is just one of many factors that influence search engines' ranking of webpages.