Namespaces are like filing cabinets. If you want to find something, you look in the right filing cabinet.
A namespace is like a filing cabinet for computer programs. It can help keep things organized. The computer can look up information much faster if it can find what it needs quickly. Without namespaces, everything a computer has saved would get mixed together like one big messy filing cabinet and it would be much harder to find what you are looking for.
Namespaces help separate things so that it's easier to find the things you need. It's like having separate filing cabinets for each different type of thing. For example, you could have one filing cabinet for pictures and one for music or another one for documents. That way, it's much easier to find what you need.