It allows you to adjust typography settings for the Body on the site. If default selected then properties will inherit from CSS code.
Also now you can set the typography for devices.
Select the font family from the drop-down list. Here you can select the System Font or the Google font to the whole Body of your website
If the browser does not support the first font family, it tries the Alternate font family.
Select the font weight from the list, it will define how bold your text is.
Set the font size you need to use in the text element.
Set the needed distance between letters.
line-height property specifies the height of a line.
Set the font transformation, if needed (uppercase, capitalize and lowercase).