Step 1: Log in to the WordPress Administrator
Step 2: Create a new page/post or edit an existing one.
Step 3:In the new post, go to the document properties column on the right side of the screen. Click on the gear icon if you don’t see the properties.
Step 4: Scroll down until you see the Discussion section.
Step 5: Click on Allow pingbacks & trackbacks.
Step 6: Click on Update or Publish document in the top right corner to save your changes.