JSON arrays allow you to group multiple items together using square brackets []. Each item inside a JSON array can be a simple value, such as a number or string, or a more complex object. In the example above, you see a JSON array that contains a list of product objects. Each product is represented by a set of key-value pairs wrapped in curly braces {}. The keys are "id", "name", and "price", and each product object in the array has its own values for these keys.

When you want to represent a collection of similar items in JSON, such as a list of products, you use an array. Arrays can hold any number of objects, and each object can have its own nested data. This structure is commonly used when dealing with lists of data, such as shopping carts, user lists, or any scenario where you need to manage multiple related records together.

Nested objects in JSON occur when an object contains another object or an array as one of its values. In the product list above, each item in the array is itself an object with its own properties. You can also nest arrays inside objects, or objects inside arrays, to represent more complex data relationships. This flexibility makes JSON a powerful format for organizing and exchanging structured data.