Used extensively to produce applets for web pages. Javascript An simple interpreted computer language used for small programming tasks within HTML web pages. Some search engines have been known to index these scripts, presumably erroneously. Keyword Density A property of the text in a web page which indicates how close together the keywords appear. Some search engines use this property for Positioning .
Analysers are available which allow comparisons between pages.
Pages can then be produced with the similar keyword densities to those found in high ranking pages. The use of keywords as part of the URL to a website. The buying of search keywords from search engines, usually to control banner ad. placement. The display of banner ads. The repeating of keywords and keyword phrases in META tags or elsewhere.