Booleans are fundamental for representing binary states, such as "isActive": true or "hasPermission": false. It is crucial to remember that true and false are lowercase literals. They are not strings, so they must not be enclosed in quotes.
Common Mistake
Writing "isComplete": "true" is incorrect if you intend to represent a boolean. The correct format is "isComplete": true. The former is a string, while the latter is a proper boolean value.