A custom audience is a group of people that are interested in your content, but who aren’t necessarily in your targeted market. These people can be gathered from various sources like your website and social media platforms like Facebook.
Go to your Audiences.
Choose Lookalike Audience from the Create audience drop-down menu.
Select your source.
Choose the country or countries where you'd want to meet people who are similar to you.
With the slide, select the desired audience size.
Create an audience by selecting Create Audience.
Advertisers can create their own custom audiences by looking at the interests and demographics of their customers, as well as what they do online (e.g., on Facebook). They can also use third-party applications like Crazy Egg or SimilarWeb, which provide detailed information about a person’s online activity and internet browser history.
A lookalike audience is a means for your adverts to reach new people who are likely to be interested in your brand because they have characteristics in common with your current consumers.