Custom Audiences from your website is a targeting option that matches people who visit your website with people on Facebook, using the Facebook pixel. You can then create an ad to show to that audience.

You can create a Custom Audience from your website for any group of visitors that you'd like to reach with targeted Facebook ads. For example, you can run a campaign to reach people who visited a product page but didn't complete a purchase to encourage them to go back to the website to do so. Or, you can create an audience of everyone who's visited your website in the past 30 days.

Learn how to create a Custom Audience from your website.

* Nguồn: Facebook