When you write product reviews you should make sure
When you write product reviews, you should make sure that you use enough keywords so that ads will match up with the reviews. You can help people better this way and also you can make some extra money when people click on the ads. This can really ad up after awhile. Quite a few people make a living off of this. When you write reviews, you can also link to some affiliate websites. Linking is a very common thing that product reviewers practice nowadays.