Absolutely they do. Otherwise no one here would be making any money. Although it did take a year to receive my first payment.
Did you enter your affiliate codes into your HubPages account?
Did you check your Adsense account reports? You can see how many clicks you are getting per day, per month, etc in those reports. You can even track individual hubs.
Make the most use from the tools you have with Google Adsense and Google Analytics for tracking your traffic.
Do what fibo777 said in his answer to you. All those things are important.
One more thing...welcome to HubPages and I wish you all the best!