I have problems with back pain (I sit all day typing, not too surprising) Facebook ad for stretching program for back pain shows up a few times. I eventually d

I have problems with back pain (I sit all day typing, not too surprising) Facebook ad for stretching program for back pain shows up a few times. I eventually decide to buy it. It works, resolves my back pain. I had a real problem, a solution was advertised to me, I bought it, and it worked. No induced demand.