One way to use the meta keywords tag is to emphasize a particular word or phrase in the main body of your text. For example, if you own a website all about plaid pants, and want to reinforce the word "tartan", then what you would want to do is have that word sprinkled liberally throughout your web copy, and also inserted into your Meta keywords.
Another option is to insert unusual words or synonyms into your Meta keywords tags that you don't actually have on the page itself. For instance, if you are a Star Wars fan and have a website about collectible Jawas, a good idea would be to put George Lucas's name in your keyword Meta tags. This would increase the odds of someone stumbling onto your page that only was looking for George Lucas; however, an even better way to increase those odds would be to include his name throughout your copy as well.
