If you have a certain area in your house where the WiFi is weak, you can use WiFi extender or booster, or If you have many devices connected, a newer router (WiFi 6 or 6E) can handle more traffic. You can also upgrade to a mesh WiFi system if you have a large home with multiple floors.
Deco BE25 | BE5000 Whole Home Mesh WiFi 7 System | TP-Link Philippines