A DAO is a Decentralised Autonomous Organisation. DAOs are collectively owned and managed by their members. Importantly. the decentralised part means that no single party has control over the direction of the organisation. As well as this, no one can access the treasury without consent from the whole group.
Funding an organisation with your hard-earned cash requires trust. And it’s hard to trust some random strangers from the internet. With DAOs, the only thing you need to trust is the DAO’s code, which is completely open-source and verifiable by anyone.