New Relic's Deployment notes features have definitely been around for a while, but like a lot of things experienced by developers outside Microsoft's ecosystem, this is another service where we're a bit late to the party. The ability to track application performance against a certain release of your application is a great way to track the progress of any work your team has put in to improve your application's performance and visitor's overall experience. Implementing it is surprisingly simple which begs the question, if you're not doing it, why not?