If you read the "common wisdom", moss thrives in poor soil that is acidic (

Thanks Andy I have no issues using Moss killer I'll check out the store for some. I do have some in a shady area which I knew was my problem there but also have some in a very sunny area. I can say in the sunny area it's very compacted. Also, I've heard that Lime helps greatly is this true?

Sure lime can help - it removes one of the three conditions that help moss thrive - low pH. I never recommend that anyone add lime without a recent soil test anymore, however, as there are at least two "bigger" problems that can come from that: overshooting the pH optimal range and/or tipping the Calcium/Magnesium ratio too far toward Magnesium (which can make the compacting situation even worse). If you have recent soil test results, post them and we'll let you know if lime could/should be used, and which type of lime to use (there are two types).