Stored WLAN connections that are no longer needed should be removed from the LG device, otherwise the device will search for these networks with priority depending on the settings, which can lead to increased battery consumption.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Wi-Fi
Step 3:  Open the  Menu
Step 4:  Tap on  Saved Wi-Fi
Step 5:  Tap on desired  Network
Step 6:  Tap on  Forget
  1. Open the Settings
  2. Tap on Wi-Fi
  3. Open the Menu
  4. Tap on Saved Wi-Fi
  5. Tap on desired Network
  6. Tap on Forget

LG Instructions