What will happen if I tap "Fix Now" in Device Maintenance? In Settings > Device Maintenance, Android says that I can tap Fix Now to improve my tablet's maintenance status.  What is Android actually going to do when I tap Fix Now?  

I don't want to press it until I know what it is going to do.  I'm running Android 7.1.1 on a Samsung Galaxy Tab A (2017).
Details from app manual


  View the status of your device’s battery, 
  storage, memory, and device security. You 
  can also automatically optimize your device’s system resources


Further, it says optimise instead of fix


  Quick Optimization
  
  The quick optimization feature improves device 
  performance through the following actions:
  
  • Identifying apps that use excessive battery power 
  and clearing unneeded items from memory.
  
  • Deleting unnecessary files and closing apps running 
  in the background.
  
  • Scanning for malware.