EOS is an application built to complement the Ethereum network. Providing many of the same functions, except at tremendously greater speeds. EOS seeks to provide an operating system-like environment for decentralized Ethereum applications to be built on. It even enables less expensive execution of extremely crucial smart contracts without ruining their integrity. The token itself is required for the creation of different applications - making it a great investment since the demand for Ethereum based development spaces will only increase as time passes and the Ethereum blockchain gets more congested.