Do you have any leaks in your home? The answer to that question is almost certainly yes. It is very difficult to have a complete plumbing system with no leaks anywhere, but fortunately, not all of them are going to be damaging to your home. Some of them will just leak water down a drain without doing any damage, but the average home leaks quite a large amount of water every day.
If you were to have a complete break on a pipe, however, you would be looking at around 14 gallons of water leaking into your home every minute, so hopefully, you are aware of where your water shutoff valves are located. It could make a huge difference with how much damage the water will do.
It is also important to be aware of where the pipes in your home are running, especially so if you are planning to do some major home improvement work that involves cutting into walls.