*Update: this is now allowed, but only on WordPress.com Business Plans – code limitations still apply to Free, Personal, and Premium Plans.
For this, you’ll need to go to your site admin area (usually something like yourwebsite.wordpress.com/wp-admin/ ).
This is how you’ll accomplish this.
In your WP admin in the sidebar, click on “links” and then “Add New” (seen at the top center-left):
Next, you’ll need to:
With that done, we simply need to place this link category within your footer. For this, find the Appearance link in your admin and then navigate to Widgets. In this window, you should now see the footer widget area. This is where we need to place the category containing our links.