What is a Changelog?

Why changelogs matter

Every product changes. The question is whether your users know about it. A changelog turns invisible work into visible progress. When users see a steady stream of improvements, they trust that the product is actively maintained. When they don't see updates, they assume nothing is happening.

For SaaS products, changelogs reduce support tickets ("does it do X now?"), improve feature adoption (users can't use what they don't know about), and build retention (visible progress gives users reasons to stay).

What belongs in a changelog

• New featuresCapabilities that didn't exist before. These drive adoption and expansion.
• ImprovementsEnhancements to existing features. Performance gains, UX refinements, workflow changes.
• Bug fixesIssues that were broken and are now fixed. Users who reported them want to know.
• Breaking changesChanges that require user action. API changes, deprecated features, migration steps.
• Security updatesPatches that address vulnerabilities. Build trust through transparency.

Changelog vs release notes

A changelog is a running log of all changes over time. Release notes describe what changed in a single release. Think of a changelog as a timeline and release notes as a snapshot. Most modern SaaS products blur the line, posting individual entries that serve both purposes.

Read: Changelog vs Release Notes — What's the Difference?

Best practices

1. Write for your audience, not your team. Users care about outcomes ('you can now export to PDF'), not implementation details ('refactored the export service').
2. Be consistent. Whether you publish weekly, biweekly, or per-release, stick to a cadence. Sporadic updates feel abandoned.
3. Categorize entries. Group changes by type (new, improved, fixed) so readers can scan for what matters to them.
4. Date everything. A changelog without dates is just a feature list. Dates prove momentum.
5. Don't bury the lead. Start with the biggest change. Most readers scan the first line and move on.

Automating your changelog

Writing changelogs manually works until it doesn't. As your team ships faster, keeping up becomes a chore. Tools like Worknotes connect to your issue tracker (Linear), read your completed tickets, and generate user-facing changelog entries using AI. You review, edit, and publish. The writing is done for you.

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