FASO's Facebook (FB) integration allows you to do several things.
When you click on Facebook in the left-hand column of your FASO account Control Panel, under Marketing Integrations, you'll see the options with a corresponding mini-explanation.
Clicking on Facebook in left column, opens this screen:
Click on Learn More below each option.
Put a Facebook icon on your FASO website that links to your Facebook Profile Page or Business Page.
This adds an FB pixel tracking code to your site.
Click here for an article on whether you really need this.
This allows a website visitor to share your artwork on their Facebook wall as well as on their Pinterest and Twitter profiles.
See this FAQ:
Add LIKE Buttons to Art ~ How Like Buttons Work
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