1. A computer-implemented method for determining one or more ad targeting keywords, the computer-implemented method comprising: a) accepting, with a computer system including a plurality of networked computers, a category; b) looking up, with the computer system, one or more keywords using the accepted category and a previously stored association of a plurality of categories and keywords; c) storing, with the computer system, at least some of the one or more keywords as one or more ad targeting keywords of an advertisement; d) controlling, with the computer system, a serving of the advertisement using the stored one or more ad targeting keywords, wherein when the advertisement is served with the computer system, presentation of the advertisement to a user is induced; performing, with the computer system, qualification testing of the one or more keywords; and determining, with the computer system, if a keyword is qualified or unqualified for use as a targeting keyword of the advertisement, wherein each of the at least some of the keywords stored as one or more ad targeting keywords of the advertisement are qualified keywords, and wherein the act of performing qualification testing of the keyword tracks a performance of a set of one or more advertisements served using the keyword as an ad targeting keyword, wherein the set of one or more advertisements includes the advertisement.