Source: MarketingTerms.com
Description Tag - an HTML tag used by Web page authors to provide a description for search engine listings.
Doorway Domain - a domain used specifically to rank well in search engines for particular keywords, serving as an entry point through which visitors pass to the main domain.
Doorway Page - a page made specifically to rank well in search engines for particular keywords, serving as an entry point through which visitors pass to the main content.
Invisible Web - the portion of the Web not accessible through Web search engines.
Keyword - a word used in a performing a search.
Keyword Density - keywords as a percentage of indexable text words.
Keyword Research - the search for keywords related to your Web site, and the analysis of which ones yield the highest return on investment (ROI).
Keywords Tag - META tag used to help define the primary keywords of a Web page.
Link Popularity - a measure of the quantity and quality of sites that link to your site.
Link Text - the text contained in (and sometimes near) a hyperlink.
Log File - file that records the activity on a Web server.
Manual Submission - adding a URL to the search engines individually by hand.
Meta Tag Generator - tool that will output META tags based on input page information.
Meta Tags - tags to describe various aspects about a Web page.
Pay Per Click (PPC) Search Engine - search engine where results are ranked according to the bid amount, and advertisers are charged when a searcher clicks on the search listing.
Search Engine Optimisation - the process of choosing targeted keyword phrases related to a site, and ensuring that the site places well when those keyword phrases are part of a Web search.
Search Engine Submission - the act of supplying a URL to a search engine in an attempt to make a search engine aware of a site or page.
Search Spy - a perpetually refreshing page that provides a real-time view of actual Web searches.
Title Tag - HTML tag used to define the text in the top line of a Web browser, also used by many search engines as the title of search listings.
Top 10 - the top ten search engine results for a particular search term.
URL - location of a resource on the Internet.
Volunteer Directory - a Web directory staffed primarily by unpaid volunteer editors.