Small cells are tiny devices that can connect to a cellular network to make calls, send texts, and access the internet. They are called "small" because they are smaller than the big towers you see on top of buildings.
Imagine if you were playing with toy cars and you wanted to talk to your friend who was across the room. If you had a big megaphone, you could shout really loudly and your friend would hear you. But if you had a smaller megaphone that only worked in a smaller area, you could talk to your friend more quietly and without bothering other people in the room.
That's kind of like how small cells work. They help your phone talk to the cellular network in areas where the big towers can't reach or where there are too many people trying to use the network at once. This can happen in places like big buildings, busy streets, or crowded events.
Small cells can be mounted on things like light posts, buildings, or even on the sides of tree trunks. They are connected to the bigger cellular network and help take some of the pressure off of the big towers. This can make it easier for you to make calls, send texts, and use the internet on your phone, even in busy places.
So basically, small cells are like little helpers that make your phone work better in crowded or hard-to-reach areas.