EOS is a decentralized blockchain platform designed for the development of scalable and efficient decentralized applications (DApps). Its architecture aims to enable vertical and horizontal scaling of DApps by providing an operating system-like set of services and functions that DApps can make use of.
One of EOS's primary innovations is the elimination of transaction fees. Instead, developers utilize resources in proportion to their stake in the system. Additionally, EOS uses a consensus model called Delegated Proof-of-Stake (DPoS), where EOS token holders vote for a select group of block producers rather than every token holder participating in consensus.
EOS was developed by Block.one and spearheaded by Dan Larimer and Brendan Blumer. The project was announced in 2017, and its year-long initial coin offering (ICO) took place from June 2017 to June 2018, raising a record-breaking amount of over $4 billion.
In terms of key milestones, EOS's mainnet was launched in June 2018. Since then, EOS has become one of the leading platforms for DApp development and deployment, with a vibrant ecosystem of applications and services built atop it.
In recent developments, EOS has continued to see growth in its DApp ecosystem and has made strides in improving platform scalability, security, and developer tools.
Above are only for introduction, not intended as investment advice.