What's the benefit of using audience expansion?

Audience expansion helps you find more potential customers by automatically reaching users who share characteristics with your manually selected audience segments. This broadens your reach beyond your initial targeting while maintaining relevance, as the system identifies similar users likely to be interested in your product or service. Translating ads into multiple languages is a separate localization strategy, not audience expansion. Automatically increasing your daily budget is a bidding or budget management function, not related to audience targeting. Restricting ads to the YouTube homepage is a placement targeting choice, not a method for expanding your audience based on similarity.