First of all click on “Edit with elementor” button. You will reach the elementor edit page. You will be able to find the widget “Reviews widget” :

Further you can adjust the layout of the section via “Advanced” setting option.

• Headings:
  • Title: This option allows you to edit the header of the widget.
  • Description: This option allows you to add the description.
• Buttons:
  • Primary Buton Label: This option will allow you to edit the reviewer name.
  • Primary Button Link: This option will allow you to add reviewer Positions.
  • Secondary Buton Label: This option will allow you to add the review.
  • Secondary Button Link: This option will allow you to add the rating.
• Reviews:
  • Reviewer picture: This option will allow you to change the reviewer image.
  • Reviewer Name: This option will allow you to edit the reviewer name.
  • Reviewer Position: This option will allow you to add reviewer Positions.
  • Rating: This option will allow you to add the rating.
  • Review: This option will allow you to add the review.