Usually brand advertising tries to skew young (even towards children, if the FTC lets them get away with it) because brand preferences are usually set in the teens and early 20s and then people purchase things on autopilot.
This may be why SnapChat has targeted brand advertisers rather than the more targeted advertisements that Facebook/Google go after.
This may be why SnapChat has targeted brand advertisers rather than the more targeted advertisements that Facebook/Google go after.