These features are powered by the Hustle plugin.
Convert your visitors into subscribers, generate more leads, and grow your social following. Features include popups, slide-ins, adding promotions to pages (embeds), and social sharing buttons.
To learn more about the features and settings, please visit their official help docs.
You can ignore the part which says "If you haven’t installed Hustle Pro yet" because it's already been installed for you.
If you have any questions, please contact our support. We'd be happy to help!