A schema is like a big database map. Just like a map shows us where countries, cities, and roads are, a schema shows us how all the different pieces of information in a database fit together.
Just like you have a bedroom, a kitchen, a living room, and a bathroom in your house, a schema has different parts too. These parts are called tables. Each table has a specific purpose and holds specific kinds of information.
For example, you might have a table for your toys, one for your clothes, and one for your books. Similarly, a database schema for a store might have a table for all of their products, a table for their customers, and a table for their orders.
The schema helps to make sure that all of the information is organized and easy to find. Just like you know that your favorite book is in the bookshelf and favorite toy is in the toy bin, the schema tells the database where to find different kinds of information.