When you buy a crate, remember to buy one that will fit your dog as an adult. A crate is psychologically very comforting for a young puppy and all dogs. Dogs are direct descendants of wolves and still carry in their genome a desire to seek secure closed spaces. The crate is your dog's modern day den. Your dog will be more comfortable when he needs to be confined at a veterinary clinic, boarding kennel or grooming shop.
Dogs often go through very destructive phases.
Crating will prevent this destruction. When animals are isolated for a short period of time before a training period, there will be a greater tendency for them to relate to you. Therefore training will become a much easier task. Psychologically puppies will not urinate or defecate where they are confined. Given any reasonable opportunity, a puppy will prefer to eliminate away from his resting area.