A testimonials section on a website can help to give more confidence to the person using the site. If multiple testimonials are uploaded, the site can automatically display a random testimonial.
The testimonial section can also be related to the area of the site that the user is currently on. An administration area is usually provided which allows website owners to log in and create, change or remove testimonials.
There can also be a testimonials page on the site to show a full list of all of the testimonials. All of the features mentioned for testimonials helps to give confidence to the user with the site and company and help to generate a higher level of sales or leads.