In addition to the app cache, the LG smartphone can also clear the system cache, which removes all temporarily stored data from the main memory.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  General
Step 3:  Tap on  Smart Doctor
Step 4:  Tap on  Memory
Step 5:  Tap on  Stop all
  1. Open the Settings
  2. Tap on General
  3. Tap on Smart Doctor
  4. Tap on Memory
  5. Tap on Stop all

LG Instructions