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What is a data dictionary and do small businesses need one?

A data dictionary is a document listing each field or metric in your data with its meaning, source, format and calculation. Small businesses benefit because it prevents misunderstandings, speeds up onboarding and keeps definitions such as active customer or net revenue consistent over time.

It can be as simple as a shared sheet with columns for name, definition, source system, owner and notes.

Useful entries to start with:

Keep it near the work, update it when definitions change, and make it readable by non-technical staff.

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Published by Zansa · Last updated 2026-11-06 · Category: Fundamentals