The Purified theme includes a Related Posts section that recommends additional reading. You can show or hide this from the full post.

screenshot demo of the Purified full post related posts section
  1. Go to the Appearance > Customize > Post Options.
  2. Look for the Display Related Posts setting and check the box to show it.
  3. From the Display Related Posts By dropdown, choose the method to use.
  4. Click the Publish button.
screenshot showing the related posts display by setting