EOS is a decentralized operating system, designed to support commercial-scale decentralized applications by providing all of the necessary core functionality.

It provides a platform for developers to create and publish their own smart contracts and decentralized applications, as well as access smart contracts and dApps from other developers.

EOS has been in the news recently because it offers an easy way to withdraw your BBS token with cheaper way. This is not an offer that Ethereum can make with its current system so u have to pay for your BBS token as a fee.