Core audiences are built using basic targeting options available to every advertiser — location, age, gender, language, interests (like “fitness” or “digital marketing”), and behaviors (like “frequent online shoppers”). This lesson covers how to combine these filters effectively to define a relevant audience without making it too narrow (limiting reach) or too broad (wasting budget on uninterested people). It also covers using Meta’s Audience Insights tool to research and validate audience size and characteristics before launching a campaign.