Have you ever seen a web site that has hundreds of keywords
repeated at the bottom of the page? Sometimes these words
are the same color as the background so you only notice them
if you highlight a section of the page and they show up as
reversed white on black text. This is an attempt by that web
site owner to rank well in the different search engines for
the keywords listed there.
Search engines used to be fooled by this technique. Some web
site promotion "experts" still recommend using this technique
while others believe that it will do little good.
In time, We expect search engines will recognize colors that are this close numerically. When they do, they will probably recognize it as an attempt to hide text and penalize sites accordingly.
Exercise caution when using this technique. Many search engines dislike it since it can be abused. Also, never enter keywords on your page that have nothing to do with your site's content, or are not used elsewhere on the page already. To do so diminishes the value of the search engine service since doing a search could display pages that don't apply to that search! If you do this, then you deserve to get banned from the search engine.
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