 Post-testing/Tracking studies provide either periodic or continuous in-market research monitoring a brand’s performance, including brand awareness, brand preference, product usage and attitudes.Some post-testing approaches simply track changes over time, while others use various methods to quantify the specific changes produced by advertising—either the campaign as a whole or by the different media utilized.Overall, advertisers use post-testing to plan future advertising campaigns, so the approaches that provide the most detailed information on the accomplishments of the campaign are most valued.