I recently switched from a Samsung GS4 to a Nexus 5X. With my Samsung phone it was easy to clear out my RAM. I did it throughout the day to keep my phone running smoothly.
With my Nexus 5X, I can't figure out how to do it. Under settings, it tells me the average RAM usage (1.7GB) and which apps are using it but not how to free up RAM. When I google it, all the results suggest I clear the cache which is not the same as RAM. I even installed an app, Greenify, to try and help free up RAM but I couldn't get my phone to allow the app the permissions needed in order to force stop and control apps running in the background. I'm using Android 7.1.1. I regularly clear open applications but that doesn't seem to help.