What everyone else has said. I would only add that when I took my dog outside with the leash, I took him to the area of the yard I wanted him to do his business.

This taught him to go in one specific area of the yard. I have a big yard and my experience with dogs is they like to poop all over the place. By teaching him to go to one corner (the far back corner) it made clean up easier and it was out of sight and smell. (I live in the desert.)

I was more leaniant with peeing since I could easily hose down that part of the yard. Especially as he got older and the old boy didn't really want to go too far into the yard to pee.

Good luck!