What is the main purpose of a shower diverter?

The main purpose of a shower diverter is to redirect water flow from the tub spout to the showerhead. When you pull up on the diverter knob or lever on the tub spout, it changes the direction of water flow, allowing you to switch between using the bathtub faucet and the shower. This function is essential for those who want the convenience of switching between bathing in the tub and taking a shower without the need for separate controls or fixtures. The diverter is typically integrated into the tub spout or may be a separate valve in the plumbing system, making it a crucial component in the design of modern shower-bath combinations.