Leaflet distribution is when people walk around and give out paper messages to people. Imagine you made a special drawing or wrote a message and you want everyone in your neighborhood to see it. But instead of going door to door yourself, you could ask other people to help you give it out.
Sometimes, companies or organizations want to promote something like a new shop or event. They can hire people to give out their special papers too. It's like they are inviting everyone to come and see what they have to offer.
When people give out these papers, they have to be careful not to litter. Littering means throwing trash on the ground and making the environment dirty. That's why it's important to only give out papers to people who want them and to make sure the leftover papers are thrown away properly.
So, leaflet distribution is like sharing information with others through special paper messages. It's a way to tell people what's new, what's exciting, or what's important.