Google Ads offer three different types of audiences you can use: 1. Affinity Audiences - groups of people who have demonstrated a strong interest in a particular topic or product category over a period of time (such as foodies, sports fans, travel enthusiasts, etc.)  2. Custom Affinity Audiences - custom audience segments based on specific interests and behaviors (for example, a travel agency could create a Custom Affinity Audience based on people who have recently searched for flights to Hawaii) 3. In-Market Audiences - groups of people who have shown recent and active intent to purchase a particular product or service. These audiences are created by analyzing users' search queries, clicks, and other online behavior.