Advertising research is the systematic gathering and analysis of information to help develop or evaluate advertising strategies, advertisements, and media campaigns. It can involve psychological, sociological, economic, and other perspectives. Advertising research is either customized for a specific client or syndicated and available for multiple companies. Common methods of advertising research include focus groups, interviews, projective techniques, questionnaires, and tests to evaluate ads before and after market deployment. The overall purpose is to improve brand awareness and increase revenue by creating more effective advertising that reaches the target market.