There's an ongoing debate in the US about using walking poles; most Americans leave them, many Europeans take them. There are benefits to using walking /hiking poles, with the biggest being that they provide balance and stabilization as you walk with the theory being because of the better balance you'll be safer walking/trekking. The poles also came in handy for determining depth of water to be crossed (streams, irrigation channels, etc.) and for retrieving fallen items.
I used poles for part of my pilgrimage and then stopped using them. My biggest issue was that I hadn't "practiced" with them enough. I wasn't fully used to using them for 4-7 hours a day and I developed terrible cramps in my hands.
There's no "right" answer to poles. It's a personal preference, as all gear choices are. But, perhaps it's more than a preference, some might say it's a philosophy of walking.
If you decide to use poles, start using them on your daily walks at home. Get some help (maybe at REI, Inc.) with finding the proper height. Get comfortable with the grips. Learn to alter your grip pressure. And, allow them to become extensions of your arms so that you become so used to them that when you walk without them they are missed.