What Is JSON? | Marketing Dictionary
DICTIONARY · WEB

What is JSON?

A lightweight data format widely used for exchanging structured information.

In plain English

JSON is a way of writing structured data as text so that different systems can pass it around. Names paired with values, nested where needed. It is readable enough that you can usually work out what a block of it means without knowing the format.

Marketers meet it in three places. Structured data on webpages, API responses when tools talk to each other, and export files from platforms.

What to know

Keys and values
Data is written as labelled pairs, grouped into objects and lists. That structure is what makes it machine-readable.
It carries structured data on pages
Schema markup is usually implemented as JSON-LD, a block of JSON in the page that describes what the page is about.
APIs speak it
When one tool sends data to another, the payload is normally JSON. Understanding the shape helps when an integration misbehaves.
Strict about syntax
A missing comma or bracket breaks the whole block. This is why an invalid structured data block often disappears entirely rather than partly working.

Why it matters

You do not need to write JSON, but it is worth recognising. Structured data, integrations and platform exports all run through it, and being able to read a block tells you whether your schema is saying what you think it says.

Common mistakes

×Pasting structured data JSON without validating it, so a syntax error silences it.
×Describing things in schema that do not appear on the page.
×Assuming an integration is broken when the data shape simply changed.
×Copying a competitor JSON-LD block without updating every value in it.

FAQs

What is JSON-LD?

JSON-LD is JSON used to express structured data on a webpage. It is the format Google recommends for schema markup.

How do I check my structured data is valid?

Use a schema validation or rich results testing tool. It will flag syntax errors and missing required properties.

WRITTEN BY TARIQ SALLAM
Marketing Consultant. Entrepreneur. Content Creator.

I'm a marketing consultant, entrepreneur and content creator. I help businesses grow through practical marketing, websites, SEO, content and AI.

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