Data is just a fancy word for pieces of information, like the answers your friends give to a question. Imagine you ask your whole class what their favorite fruit is. The answers come in as one big messy pile of words.
A messy pile is hard to understand. But if you put all the apple answers together, all the banana answers together, and all the grape answers together, suddenly it makes sense. Sorting answers into groups turns a messy pile into something you can count.
Each group is like its own basket with a label on it. When a new answer comes in, you drop it into the basket that matches. By the end, every answer has a home, and no answer is left in the mess.
Once the answers are sorted, counting is easy. You just count how many are in each basket. Maybe seven friends love apples and only two love grapes. Now you know something true about your class.
Computers sort data into groups all the time. A music app groups your songs by singer, and a photo app groups your pictures by the day you took them. Grouping is how computers help you find what you need fast.
Sorting into groups is a superpower for making sense of the world. Whenever you have a big pile of anything, ask yourself what groups it could fit into, and the mess will turn into an answer.