Why is my Wi-Fi signal so bad?

Bill has powerline adapters for his internet access and his Wi-Fi signal isn't very good. Rich says when powerline adapting, he will need to be on the same circuit in order for the router to work right. A better solution is to go with a new mesh router. He can expand the network with a simple access point beacon. Rich uses Eero. It's a little more expensive, and there are others including Plume. But this is a better way to improve the wireless signal in his house.