In Typography, you can manage fonts and their properties. In Publisher, for every page, block, widget, etc, You can add a separated typography panel which gives you the ability to control: Font Family, Font Weight, Font Character Set, Text Align, Text Transform, Font Size, Letter Spacing, Font Color.

In the theme panel go to BuddySocial → Typography → Typography:

You will find the following options:

Body Typography: Allow to you change body typography font family, font weight, font size, line-height.
Menu Typography: Allow to you change Menu font family, font weight, font size.
Sub Menu Typography: Allow to you change Sub Menu typography font family, font weight, font size, line-height.
Heading Typography: Allow to you change Heading typography font-family, font-weight.

Add New Custom Font: Allow to you add new custom font using google font.