Phillip wants to create a new Google Display Ad campaign and base his targeting on an existing remarketing list named Checkout Abandoners. How can the Similar Audiences targeting option help Phillip achieve his marketing goals?

Similar Audiences identifies new users who share characteristics and behaviors with those already on your existing remarketing lists, like "Checkout Abandoners." This expands your reach to potential customers who are likely to be interested in your products or services because they resemble your current high-value audience. The other options are incorrect because Similar Audiences doesn't find websites/apps visited by the original list users, recommend specific sites for ad placement based on content relevance, or automatically generate keyword/URL lists. Its core function is audience expansion based on similarity.