What they are, how they work, and why your app needs them You log into an application. A few seconds later, you are in — and the app knows who you are, what you are allowed to do, and keeps knowing it for the rest of your session. But how?
Source: [Dev.to](https://dev.to/_stefano_pinato/what-are-jwt-tokens-and-why-your-app-needs-them-3pjc)