comScore Segment Metrix H/M/L comScore Segment Metrix H/M/L details the online behavior of heavy, medium and light Internet users, providing important data for marketers, advertisers and publishers to find hard to reach light Internet users, and adjust for the disproportionately large footprint of heavy Internet users on the Web. in Public bookmarkswith behaviorcomscoreheavylightmediummetrixonlinesegment