A system for presenting keywords obtained from users in a review process. The keywords are displayed along with a use value that reflects the number of times users have voted or selected the keyword as being relevant or effective in a review of a product. The keywords can be used to assist consumers in deciding whether to purchase a product or a service, in determining a brand's reputation, or for other purposes. Keywords can be ranked according to usage criteria such as the frequency of use of the keyword in reviews, the reputation of a user/reviewer who created or used the keyword, etc. Rankings can be dynamically updated when keyword usage changes. Such as when a keyword declines in popularity, when words change in meaning or become obsolete or irrelevant with respect to their original intent, etc. Keywords can be used as filters for product searches.