What is RAM boost in OnePlus?

RAM Boost. An advanced feature, RAM boost will help you see slight performance gains on the Oneplus by predicting the apps you’re likely to launch and pre-loading them so launch times are smaller.

How can I increase my OnePlus one memory?

Open the Settings on your OnePlus phone. Now go to About Device and tap on the RAM section. There you will find the RAM Expansion toggle, tap on the toggle to enable it. Once you enable RAM Expansion you can set the amount of extra RAM you want to assign.