hese options determine how the blog should be displayed. Please go to Mastery > Blog
Excerpt Length & Excerpt Suffix
To determine the maximum number of characters in the post’s excerpt when post archive page is being display as Grid Style, enter the value in the Excerpt Length option. The exceprt will then be followed by some text or characters entered in the option Excerpt Suffix.
Post Grid Column & Post Grid Row
This setting use for Grid Blog Template which you can create a new page and choose template “Grid Blog”.