Step 1. From the Admin Dashboard, go to Setup -> Settings, click on "Social Icons Settings".
Step 2. And then select the Referral Program.
Step 3. In the following page, check the box to enable the option and click "Update".
Step 4. Login into your Squarespace shopping cart.
Step 5. Under Website option, click on your site.
Step 6. Getting into the site option, click on "Design".
Step 7. Under Design, click on "Logo & Title".
Step 8. Add a Tag Line, upload your Logo and save it.