In General tab you can customize your Logo and Typography.
Logo and sticked Logo are the one that displayed on your header and will be the representative of your site.
The Site icon is the tiny icon that shown next to your site’s name on browser
There are 2 categories in Typography: Body and Heading.
Body is where you customize the content text of the page, post and element on the whole site.
Heading is the place you can customize the fonts, sizes and other factors of headings, such as Heading 1, Heading 2, and so on.