The phrase "confidence builder" refers to something or someone that helps increase a person's belief in their abilities or feel more self-assured. It provides an experience or support that boosts confidence and makes someone feel more capable.
As always, if your store is connected to grooming, selling products that the groomers use is a great confidence builder for your customers. (petbusiness.com)
Weight pulling also has additional benefit of being a great confidence builder and also helps socialize your dog to learn to work with other dogs close by without interfering with them. (poochpartners.ca)
A great lesson for students to see that even adults make very silly mistakes and a real confidence builder for them to note how they could do it better. (tes.com)