This info is available on Cardano.org website:
Cardano is a blockchain platform for changemakers, innovators, and visionaries, with the tools and technologies required to create possibility for the many, as well as the few, and bring about positive global change.
Cardano is a proof-of-stake blockchain platform: the first to be founded on peer-reviewed research and developed through evidence-based methods. It combines pioneering technologies to provide unparalleled security and sustainability to decentralized applications, systems, and societies.
With a leading team of engineers, Cardano exists to redistribute power from unaccountable structures to the margins – to individuals – and be an enabling force for positive change and progress.
Cardano is being built to solve real world problems, and help decentralize heavy centralized systems!
Here are some videos about Cardano’s objectives, community and others:
This video explains in a very good and detailed way, how Cardano was built, the stages, the community, etc.
And this video is the beginning of Cardano, explained by Charles Hoskinson himself