MORE AdvertisingThe co-owners of MORE Advertising, Managing Partner and President Judi Haber, left, and Founder and CEO Donna Latson Gittens. A Watertown-based advertising agency with a different focus has been in business for nearly a quarter century. Unlike most agencies it does not market products, it works on campaigns of behavior change, including Massachusetts’ COVID-19 prevention and vaccination efforts. MORE Advertising is a full-service, integrated advertising agency, but there is a major difference from most agencies, said Managing Partner and President Judi Haber. “Traditional advertising agencies sell products.