Sure thing! A cartaz is a word from Portuguese language which means 'poster'. It's like a big piece of paper or board where people can put up information or pictures to tell others about something.
Imagine you are having a big party and you want all of your friends to come. You would create a cartaz by writing the date, time, and location of the party, with a fun picture or design to catch their attention. You could then hang up the cartaz at school or community center so that others can see it and know about your party.
People also use cartaz for advertising things like concerts, movies, or even selling their used stuff. It is a great way to spread information to many people at once. And that's what cartaz is all about!