Fonts Size & Font Family.

Question

I want to know what's is the font size and font family are used on this apps.
e.i: comment section font size and family?

sorry for my bad english

Answer 1

font-size is to set the size of the text (how big or small) and font-family is just to set a different font to the text (i.e. Roboto, Noto, sans-serif, ...)