Navigate to your home page and scroll down to the "footer" box.
To add the "Social channels" plugin, create a new content box and choose "Social channels" under the tab "Special elements".
Add a new social channel by choosing one from the dropdown list.
You can just choose an icon and link it.
Or you can add an image, then this image will be displayed in a pop-up when clicking on the icon.
Or you can add an image and include a link for that image, then this image will only appear when hovering over the icon.
This is how it looks on mobile devices.