Adding keyword terms over and over again in content, Meta tags, Alt Attributes and comment tags. The intent is to make the search engines believe that the page is relevant for the keyword term and thus inflate its ranking. This can adversely affect pages because, if caught, search engines will penalize a keyword stuffed site or completely remove it from the index. We always recommend having your most targeted keywords appear in the Title tag, Meta Description tag, Meta Keywords tag, Heading tag and of course within the content. As a general rule, we recommend not repeating a keyword more than once in the Title tag, twice in the Description tag and not more than four times in the Meta Keywords tag. Remember, search engines can penalize your site for keyword stuffing. Write for the user not the search engines. The content should read naturally, not feel or sound forced.