What are Wi-Fi range extenders/amplifier? Will they improve the wireless internet connection to my Doorbell?

A wireless repeater is a stand-alone unit that extends the range of your Wi-Fi signal by repeating the signal over a greater distance. They are simple devices that are easy to connect to your Wi-Fi network. Once connected, position your repeater somewhere near your device to ensure the best possible signal. We recommend you configure the repeater with a unique network name (SSID) and then connect your Doorbell to this unique network name.