Okay, so imagine you and your friends go to a place called a cabildo. This is a special building that people used to go to in old times to talk about important things and make decisions for their community.
Now, imagine that in this cabildo, everyone is allowed to speak their mind and share their ideas. This is what we call an "open cabildo." It means that it's not just the important people who get to talk and make decisions, but everyone who wants to can share their thoughts and opinions.
This is really important because everyone's voice deserves to be heard, not just a select few. So, an open cabildo is a way for everyone to come together and work together to make their community a better place.