You can add social media or external website link on your Storefront.
How to add a link card on the storefront
Step 1: Start by clicking on Design.
Step 2: Next, click on Storefront.
Step 3: Then, click on Add card.
Step 4: Click on Link.
Step 5: Type in the link title and URL that you want to include
And that's it! You have successfully added a link to your storefront.