Social connections are very important for your brand awareness. Timber moves things one step further and offers you the option to create an accessible resume for your portfolio website on the social section to let your users find some more details about you in a simple manner.
The small icon on the top right corner of your website that can be used for this job. The main advantage of this section is that it can be easily created and edited using simple widgets. The whole area is made out of 3 sections: Overlay — Content (1), Overlay — Left Sidebar (2) and Overlay — Right Sidebar (3).
In order to edit the content for this overlay page, you just simply need to go to the dashboard area and access the Appearance → Widgets section. You can find here all the sections mentioned above and add/remove any widget you like.