Keyword Optimization For Search Engines and Directories

The Meta Keywords tag is not viewable by the visitor to the site as it resides in the HTML coding of the site. This tag is only used by the search engines and directories as a reference to what search results your web site should be in. If you decide to create the Meta Keywords Tags, remember this: you can separate the keywords by commas, but if you do, do not put a space after the commas. This will cause there search engines to see this as an empty space, and also is wasting space in your code.
Another thing to remember is that there are certain "poison" or "stop" words that the search engines immediately filter out.
An example of one of the "stop" words would be "free", "online", or "the."

Search Engines Optimization