Popular assemblies are made up of people who come together to talk about things that matter to them in their community. These people have a voice, and they can share their ideas and opinions with each other. They are like a big group of friends talking together, but they are grouped together because they have a common goal or point of view. Popular assemblies usually meet to talk about important issues that affect their community, and they make decisions by voting together. It's kind of like a mini-democracy!