why is my laptop using 12gb of ram with only steam and firefox open?

idk what my computer is doing with ~10gb of extra ram but it's been occupied by some mystery process (or something i really dont know) for a week or so now and idk what to do about it

https://preview.redd.it/t93gqa0m5uee1.png?width=2560&format=png&auto=webp&s=e7485523fe7ad7d6fb1c2310432a3384dec1e0e8