As your brain reads your documents, it keeps improving on its own. A few choices still work better with a person confirming them. Brain Center gathers all of those choices into one page so you can review them together instead of hunting through separate screens.
Navigate to Workspace > Organization > Brain Center. Each item asks a plain question, shows what it found, and offers a recommended answer. You confirm, adjust, or skip. Nothing here is required reading. If you never open it, your brain keeps working. Reviewing just makes it a little sharper.