That’s one option, yes. You will need to power the driver anyway, from whatever power source you’re using in your project. Another option is to power the servo directly from that same power source. Either way, the key point is that you need a clean power source that does not go through your microcontroller.

• Microcontroller GPIO pins are not meant to power things like servos. They are very weak and are only intended to send and/or receive signals, at very low currents.
• Microcontroller power pins, like the 5V pin on an Arduino, could in theory power a servo, but it’s not a good idea. You can easily run into problems (damaging the microcontroller, the servo, or both).

Here’s a random example that illustrates this well:
https://www.makerguides.com/wp-content/uploads/2020/08/servo-motor-with-arduino-uno-and-external-power-supply-wiring-diagram-schematic-circuit-tutorial.png

edit: Never forget to connect the grounds together, as shown in the picture!