By means of a relay, a circuit with much more power can be switched with a relatively small current.
Customer reviews about Relay modules
Raffie12V 10A relayGreat product! Soldered and everything works again!
DennisSparkFun Qwiic Single RelayHandy module for switching via microcontrollers. Easy to connect with the Qwiic system, without soldering. Works fine via I2C and is reliable under high load.
FloRelay module 5VWorks perfectly. I use it to trigger a plasma cutter from a Creality Falcon 10w engraver. Requires adding a 5V power supply ( USB in my case) to avoid IO collapse