What is a Decentralized autonomous organization or “DAO”?
Decentralized autonomous organization is a new way, how we can do business. Imagine, that your company has fixed rules defined by programming code, where no one can something edit or delete without permission of others. DAO is a modern concept of company 2.0, where everything has strict rules defined by programming code. Also, in DAO you can code a lot of things like distribution of profits, voting rights or distribution of shares. For more detail about DAO concept, you can check wikipedia definition.
As a result of the Blockchain technology and Ethereum development, you can finally create own DAOs (DAO could be a type of Dapp). Ethereum is probably actual most popular platform for creating DAOs because it has the function called smart contracts. Also, NEO offers a similar option, where you can DAO thru own smart contracts solution.