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A simple text format for structured data: objects, arrays, strings, numbers, booleans, and null.
JSON is the default language apps use to pass data around. An API response, a config file, or a tool call argument often looks like { "name": "Boostor", "active": true }. It is readable by humans and easy for code to parse, but it is strict: keys need quotes, commas matter, and comments are not allowed in plain JSON.
Plainly
Think of JSON as a labeled box where an app keeps important things. A simple text format for structured data: objects, arrays, strings, numbers, booleans, and null.
In practice
Use it when a feature reads, writes, migrates, validates, or audits stored information. In practice, define the owner, input, output, and failure mode before you rely on it.