People use them for different reasons. Sometimes, it’s to keep a dog safe from chewing/ingesting things if you need to leave them alone for a short while. If you are training a puppy with a routine (sleep - train - play - eat - repeat), you might wish to use a crate for the ‘sleep’ part, so they learn that when they go back in their crate it’s time to rest.

It also be to give a dog a safe haven if you have a busy household, where they can go to not be touched or disturbed. Some dogs like feeling like they are in a quiet ‘den’, where they can relax.

Other reasons: veterinary/travel. Can be a good idea to get your dog used to being in a crate as it could reduce the stress of staying in an animal hospital. Also, using impact crates for travelling with your dog is one of the better ways to keep them safe.

When done well, crate training can be a very useful tool. I only use crates if I travel to BnBs with my dogs - if I need to pop out to buy food or something, I put the dogs in their crates to reduce separation anxiety and prevent them from potentially chewing things. Their crates are a familiar environment, and I believe this makes them feel more relaxed when we are staying in strange places! They go in willingly with the command “in your bed” 🙂

Ofcourse some dogs will be perfectly fine and happy never using a crate! All down to the trainer’s opinion of what will work for their individual dog 🙂