I often hear the question - what is considered a good domain rating (authority)? Generally speaking, the higher the "authority" of your domain, the better. But it is important not to judge it in absolute terms. Because domain ranking is, by definition, a relative metric. You can't say that a good domain rating is 30, or 50, or 60, or 70. Everything is relative. It's important to remember that this score is an evaluation of a third-party service, not a search engine. When you use some DA validation tool, it is always developed by some company and data from different services may differ. I hope I didn't confuse you.
