Term	Description
Keyword	Word or phrase carefully chosen by online business or website owner that is then implemented in website content, headers, meta data, body text and URL string etc in order to rank higher according to that keyword in search engines.
Keyword Density	A way to measure how often a keyword or phrase appears on a web page. By retrieving a certain percentage of how often the keywords appears in relation to number of words of the web page, the importance of the page according to the keyword can be determined. Often used in search engine optimization. Keyword density can also be used to see if keywords appear to often, risking to be consider spam by the search engines.