For a new awareness Google Video campaign that uses custom audiences, you're considering overlaying Demographics and Detailed Demographics with Custom Audiences. Why should you keep the two audience solutions separate?

Demographic targeting and Detailed Demographics are narrowing controls in Google Ads, so adding them on top of Custom Audiences reduces the pool of eligible viewers. For an awareness setup, broader delivery is important because the goal is to maximize exposure rather than tightly filter reach. Google’s Video campaign guidance specifically notes that narrow audience targeting can restrict reach. Keeping these audience solutions separate helps preserve scale while still allowing each signal set to be evaluated on its own. Google Help+2Google Help+2