The title says it all. Communicating over continuous socket connections sounds intimidating and complicated to a new dev. Socket.io makes it more approachable, and even scales to the enterprise level (in fact, I've used it professionally from startup through mature products.

Socket.io é super fácil de começar a usar. Você só precisa escrever algumas linhas de código tanto no lado do cliente quanto no lado do servidor para poder se comunicar através de WebSockets.

It is actively maintained. By "actively" I mean that all tickets are getting reviewed in a matter of a day-two and you get a meaningful response. very powerful due to its advanced features and its implementation in making RTA(Real-time Application).