Adding quotes can help you highlight great reviews from your audience or phrases that inspire you.
Get started by clicking the + Inserter icon 
at the bottom-left corner of the screen and select the Quote Block from the blocks list
Once you add the block you can then add the quote and the author and you can also access the same settings from the paragraph block
How the quote will be displayed on your site will depend on the theme (template) you are using on your site. You can see some examples below:
