Keyword stuffing is the practice of loading your web pages with keywords in an effort to artificially improve your ranking in search engine results. Depending on the page that you’re trying to stuff, this could mean that you use a specific keyword or keyphrase a dozen times or hundreds of times.
Temporarily, this might improve your page ranking. However, if it does, the improvement won’t last, because when the search engine crawler examines your site, it will find the multiple keyword uses. Because search engine crawlers use an algorithm to determine if a keyword is used a reasonable number of times on your site, it will discover very quickly that your site can’t support the number of times you’ve used that keyword or keyphrase.
The result will be that your site is either dropped deeper into the ranking or (and this is what happens in most cases), it will be removed completely from search engine rankings.
Keyword stuffing is one more black-hat SEO technique that you should avoid. To keep from inadvertently crossing the keyword stuffing line, you’ll need to do your “due diligence” when researching your keywords. And you’ll have to use caution when placing keywords on your web site or in the meta tagging of your site.
Use your keywords only the number of times that it’s absolutely essential. And if it’s not essential, don’t use the word or phrase simply as a tactic to increase your rankings. Don’t be tempted. The result of that temptation could be the exact opposite of what you’re trying to achieve.