How to Add / Remove testimonials?

• Find ‘Testimonial’ in WP Admin Menu
• Go to : Testimonial > Add New

  
• Add your content / title / client name / featured image etc. and publish.
  This is just as a normal blog post.

  

How to add testimonial in page?

You can add testimonial carousel via element available in theme addons.
Rest all settings like number of testimonials to show etc. are in element itself.