What is the purpose of @next/react-dev-overlay

I am working on a NextJs project. In it, I have found this piece of code inside next.config.js:

const withTM = require('next-transpile-modules')([
    'some package',
    'some package',
    'emittery',
    '@next/react-dev-overlay'
]);

I was wondering what is the purpose of this @next/react-dev-overlay and was not able to find anything online. The only thing was this unanswered question in the nextjs github issues. When I remove it, it seems that the project is working as expected. My question is what is the purpose of this @next/react-dev-overlay package and should I remove it?