This is called a putting green. It can also be called a practice green.
The green.
You are putting.
mini golf is basically putting practice with obstacles
That's called the green.
Mini Golf was invented as a tourist atraction for a southernour's hotel.
Green is a noun here, meaning a part of the golf course (putting area). The word golf is an abstract noun for a game - it is a process with rules, that cannot be seen or touched, even though the golfers and golf clubs, and fairways are all concrete nouns.
Hole out is simply finishing a hole of golf, obviously by putting the ball in the hole.
Angel Park Golf Course.
Putting
Putting
By practicing on the driving range or putting green of a golf course.
The Potty Putter is a golf putting game designed to use on the toilet so people can practice their putting skills whilst using the toilet. It is meant to improve your putting skills out on the golf course.