Oh, good question. In the same way that people "Google" questions and get answers... in the same way that people go to "ASK.com" and get answers, HubPages has an opportunity to be a resource that people can use to get answers to questions.
For example, have you ever Googled a question and was directed to a "Yahoo" forum for the answer? The Yahoo session was just a bunch of people answering the question from their point of view. And, the person who asked the original question can select the best answer. If we hubbers are responsible in the questions we ask and answer, we also have an opportunity to earn a portion of the revenue generated from the Q&A session that we produce.
This is just my opinion, but I believe it is important to ask questions to which people would like the answer. For instance, I think a good question might be, "How would I teach my son how to tie his shoelaces?" That would be a question people would really like the answer to. On the other hand, if you ask a question like, "What is your favorite sock color?" You might get people answering the latter question, but you won't get as many people Googling the latter question as you would for someone asking for help in teaching their child how to tie their shoelaces... or any other question they would like to have the answer.
Some people are not aware of the income generating aspect of the Q&A's, so they just ask questions Willie Nillie. I only ask questions that I think people on the internet are likely to want to know the answer, because, when people Google my question and come to HubPages to read the answers, income is generated from ads on my Q&A page.