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JSON is a data exchange format whose name stands for JavaScript Object Notation). It's an alternative to XML (Extensible Markup Language), which is very similar to HTML in that it uses tags between angle brackets. JSON gets its name from the fact that its data format resembles JavaScript objects.

JSON has become more popular than XML over the years because it's lighter and generally more succinct than the equivalent XML. For example, in JSON this:

Jeffrey
Giraffe

would look like this:

{
"pets": [
 {
  "name": "Jeffrey",
  "species": "Giraffe"
  }
 ]
}

Look, ma! No tags!

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