As described in the introduction, DAO DAO is a tool for building DAOs.
Now, here's the fully-jargoned explanation. DAO DAO is a tool for building multi-chain DAOs: DAOs whose treasuries can hold any IBC-supporting token, and DAOs whose tokens can be transferred to any IBC-supporting chain. DAO DAO is deployed on the Juno network, a smart contracting platform built around CosmWasm. DAO DAO's contracts are written in Rust. DAO DAO provides these contracts and a UI for managing them.
Not sure what any of these terms mean? Don't worry! Continue on to learn more about IBC, Juno, and CosmWasm.