The Plumo Ceremony generated a trusted setup for KZG commitments over BW6-761 curve. The outcome can be used not only by cLabs, but also by any project that uses the BW6 curve with the Groth16 proving system or any other based on polynomial commitments. In fact, it was originally run for Celo Plumo and later reused for Linea prover. The Ceremony had 55 participants and 8 rounds.
This phase was circuit agnostic, meaning that anyone who wants to build a SNARK circuit can use the outputs from this phase to bootstrap their SNARK circuit. This means that the output is a wider public good, which can be highlighted as a contribution from the Celo community to the larger cryptography community.You can learn how to verify Phase 1 here.
The second part of the setup, Phase 2, is more specific to the Plumo SNARK circuit itself. This phase led to the outputs that enabled proving SNARKs and verifying them. This was not a public good, and was used specifically for Celo Plumo (now discontinued).You can learn how to verify Phase 2 here.