4. In day of old, some people tried the trick of having a very short page for particularkeyword.
For example, the page may only have the following one sentence, "keyword density" is important in "search engine ranking". since there were so few words on the page, the page was actually easy to draft and the keywords
"keyword density" and "search engine ranking" have a very highdensity on that page. This method is not very useful nowadays. For example, at the time I wrote this, it no longer appears to work with Alta Vista. Which seems to rank page that are bigger than 4k more fovourably.