To build confidence in dogs, you can use repeated exposure to the scary thing so that it becomes less novel and more routine, this is called desensitization. If you want to get your dog comfortable with, say, going to a popular park, first bring them to a quiet corner of the park and allow them to see and hear other people and dogs from a safe distance. Observe their body language closely to get clues about how they're feeling. Over many short sessions, you can move incrementally closer to the busy walkways and more crowded areas, always watching the dog for signs of discomfort. If you’re unsure how to make an exposure less overwhelming to start with, think about how you can manage factors such as noise level, amount of the stimulus, and invasiveness or distance from the scary thing. For example, if your dog is anxious about meeting new dogs, ask a friend with a well-socialized dog to help, with both dogs on leash, take a walk parallel to each other, far enough apart that the dogs can’t touch. As your dog gets more comfortable, you can gradually move them closer to each other. You can enhance the desensitization sessions by adding really yummy treats, called counter-conditioning.