To add a new link, navigate to the general tab of your company settings. Scroll to the bottom of the page until you come to your company links.
Click create link. A new window will appear. From here, enter the link name and URL followed by the category you wish to save it under. Then, select the users you would like to share it with.
Once you have done this, hit save. The new link will now appear for the users you shared it with on their profiles.