Brave uses high memory?

I am using Brave [Version 1.18.75 Chromium: 87.0.4280.101 (Official Build) (64-bit)]
and currently I have only two tabs, this and discord browser app
Even with only discord open the Ram Brave uses is high.
I just closed discord app and the RAM usage of Brave it’s still the same
How I can fix it?

You can’t, because that’s the amount of RAM that Chromium-based browsers use. Firefox uses up RAM as well.