Ok, this is probably something most people have no need for nor care about, but for my purposes, I’ve found it to be a useful tool. Facebook’s debugger detects any errors that may be on a page, which makes it easy to see what might need fixing. This is really helpful when, say, a blogger wants to post a link to their blog post but the image isn’t being pulled correctly. A quick check on this site can pinpoint the issue (or at least eliminate other factors) without having to trudge through the code trying to figure it out. It’s simple and provides a service that really eases a pain for those of us who have to deal with it. Great way to enhance our operations and save time and hassle.