So basically I got a Surface pro 9 intel i5 16gb ram 256ssd but it always uses half of the memory (8-9gb) when I barely got anything open. My laptop runs great but I’m woried this is a huge drain on my battery. The processor is running great is have barely seen it going over 25% usage. I also dont want to shut of random things for which I don’t even know what they do.

Are there any applications/apps that can help with this?