You create a menu and add your social media profile links as custom links.
Below is the full description from the theme documentation:
Create a new menu in WordPress dashboard >> Appearance >> Menus
Make sure to use social profile URLs as “Custom Links” inside Menu.
This theme supports Facebook, Twitter, Dribbble, Flickr, Google+, Skype, Pinterest.com, LinkedIn, Vimeo, Tumblr, Instagram, RSS feed (example: https://colorlib.com/feed ) SoundCloud, Foursquare, Github, Spotify and Email (mailto:[email protected]).
Once you are done with menu items (Social Profiles) you should select “Theme Location” for menu as “Social Menu”. For more info please see a screenshot below.
Social Media Icons by default will appear inside footer are but you can also use “Sparkling Social Widget” to add them in other Widget Areas.