You'll Know What Commands To Use So That Your Dog Clearly Understands You
As a dog owner we need to make sure that we help our dogs avoid the many dangerous situations that they face daily. A trained dog tends to avoid these situations and understands what they are meant to do to get out of them, just by uttering a command you could ensure that your dog avoids dangerous situations and learns not to be in such positions in the future.
You'll Have A Much Healthier Dog
This is a bold claim but a true one too, trained dogs seems to be much more healthier. I believe you've seen this when out walking your dog in the park or in public with other dog owners.