Our TGI service enables advertisers, agencies, media owners and publishers to identify, target and reach their key consumer audiences. TGI is a global network of single source market research surveys providing valuable and comparable consumer insights since 1969. TGI (Target Group Index) data is available quarterly and covers consumer attitudes, habits, motivations and behaviours; every piece of data collected can by split. Global TGI (Target Group Index) is a global network of single-source market research surveys providing invaluable, comparable consumer insights for over 60 countries across six continents. TGI Fridays is an American restaurant chain focusing on casual dining. TGI (Target Index Group) is “.