Keywords

Keyword density is the percentage of words on a web page that match a specified set of keywords. In the context of search engine optimization keyword density can be used as a factor in determining whether a web page is relevant to a specified keyword or keyword phrase. Due to the ease of managing keywords, search engines usually implement other measures of relevancy to prevent unscrupulous webmasters from creating search spam through practices such as keyword stuffing .

Keyword stuffing is considered to be an unethical Search engine optimization (SEO) technique. Keyword stuffing is when a web page is loaded up with keywords in the Meta tags or on the Web page's content. The common techniques today for keyword stuffing are repeating the same word over and over again in the Meta tags, which is why many search engines don't look at the Meta tags any more, and also on the page with text that is the same color as the background, also known as invisible or hidden text.

The reason keyword stuffing is used is to obtain maximum search engine ranking and visibility for particular phrases with the purpose of getting visitors from the search engine (such as Google , Yahoo! , MSN Search etc.) to come to their web page. However, if the word is repeated too much it will raise a red flag to the search engines and they will likely place a spam filter on the Web site or Web page.