I get different notices such as that from time to time. The most recent came in September from "Change Healthcare", a healthcare technology company connecting patients, providers, and payers in the U.S. healthcare system. Several Medicare Advantage Plans use them. The warning was about a data breach, advising everyone to monitor their credit, freeze credit, etc. I got another one from AT&T.
Maybe this is wrong of me, but it's all becoming so commonplace that I just do nothing. Otherwise, I'd have to constantly be taking action. And there are some inconveniences with credit frozen. For example, my car insurer checks credit, and my rating is a factor in calculating my premium. I'm not sure they could even check it if I put restrictions on my credit.