There is no right answer to this question but there are some things to consider if you are trying to decide whether to leave your computer on or off. One reason to leave it on would be for instant access rather than having to wait for it to boot up each time you want to use it. If you are constantly on and off your computer all day then you may be better off leaving it on. Or if you have an older computer that boots up really slow or does not boot up successfully every time then leaving it on may be the way to go. Some people say leaving your computer on wears it out faster but they are really designed to be left on. Many computers have been left on for years nonstop with no problems. You can have your computer hibernate or shut down components like the hard drive and monitor after a set amount of time to save energy.
If you don’t use your computer too often then turning it off after each use may work better for you. If your computer is located in a hot room with poor ventilation then you should shut it down after using it to avoid damage from excessive heat. You should also look into keeping the room or computer cooler when it’s in use as well. Occasional reboots are good to “freshen up” your computer if it’s been running for a long time. It will clear out the RAM and reload processes and programs that may not be running as well as they could be.
The bottom line is that it is up to you to decide whether to leave your computer on or off when not in use.