When you build out your keyword list, you should also build variations of the popular terms with common keyword qualifiers. A keyword qualifier is simply an additional term, usually an adjective, that the search users employ to further narrow their search. For example, some Internet users might search for Expert plumbing repair, rather than Plumbing repair. Qualifiers might not always represent desirable searches; qualifiers like Free and Research tend to indicate folks looking for a do-it-yourself or free solution to a problem. The most popular qualifiers generally fall into one of the few categories. Some common categories and corresponding search qualifiers are the following:
Price qualifiers indicate searchers looking for a low price: cheap, free, discount, sale, bargain, and so forth. Although you should consider whether bargain hunters are the customers you want in the first place
Quality/Experience qualifiers indicate searchers looking for...