How to move windows operating system to ssd?

Hi
Hey guys! I want to ask you guys if you’ll know how to move the operating system to the ssd of my laptop. So I noticed that my laptop was just 34 gb free and still have a lot of storage left in my ssd. I wanted to download a large game but don’t know how to move the operating system to the ssd. I asked my friend for help with it and he told me that I can move the os from the main storage to the ssd of my laptop.
Thanks in advance if someone could help!