Lookalike audiences are an effective way to increase your social media reach and meet your marketing objectives. To make the most out of them, you should choose a high-quality and relevant source audience that reflects your goals, experiment with different source audiences, regions, and sizes of lookalike audiences, and update your source and lookalike audiences frequently. For instance, you can use dynamic or automated source audiences, such as website visitors or app users in the last 30 days, rather than static or manual source audiences. You can also create a 1%, 3%, and 5% lookalike audience of your email list of customers who purchased from you in the last 30 days, and target them in different regions or with different ad creatives to see which one delivers the best results. By utilizing lookalike audiences strategically, you can expose potential customers to your brand, products, or services while optimizing your campaigns for improved performance.