Product Marketing


What is a Changelog?
Definition of Changelog
A changelog is a chronological version history document detailing key code changes made over multiple software releases. It often includes each update's purpose, author, date, issue tracker ticket links and other metadata used to simplify code auditing, debugging, compliance, and enabling users to understand the latest modifications impacting applications.

In the realm of product management and operations, the term 'Changelog' holds significant importance. A changelog is a record of all notable changes made to a project or software. It usually includes records of changes such as bug fixes, new features, improvements, and other alterations. This document serves as a chronological set of notes that provide users with a clear understanding of the ongoing changes in a product.

Changelogs play a crucial role in communicating what's new and what's changed in a product to the stakeholders. They help in maintaining transparency with the users, and also assist the development team in tracking the progress of the product. In this glossary entry, we will delve into the intricacies of a changelog in the context of product management and operations.

Changelog: An Overview

A changelog, in the simplest terms, is a log or record of all notable changes made to a project. It's a file that contains a curated, chronologically ordered list of changes for each version of a project. The purpose of a changelog is to document all the changes in a project over time, providing a clear overview of the project's evolution.

Changelogs are not just for developers or project managers, but also for end users. For users, changelogs provide a clear understanding of the changes that have been made in the new version of a product. For developers, it's a way of communicating the changes they have made, which can be particularly useful when multiple developers are working on the same project.

Components of a Changelog

A typical changelog consists of several key components. These include the version number, release date, and a list of changes made in that version. The changes are usually categorized under several headings such as 'Added' for new features, 'Changed' for changes in existing functionality, 'Deprecated' for soon-to-be removed features, 'Removed' for now removed features, 'Fixed' for any bug fixes, and 'Security' for any security improvements.

It's important to note that not all changes are recorded in the changelog. Only changes that affect the user's experience or the functionality of the project are included. Minor changes, such as fixing a typo in the code, are usually not included in the changelog.

Importance of a Changelog

Changelogs are an integral part of product management and operations for several reasons. They provide a historical context for the project, allowing anyone to see the progress and changes over time. This can be particularly useful for new team members who need to get up to speed quickly.

Furthermore, changelogs are a form of communication between the project team and the users. They inform users about the changes in the new version, which can affect how they use the product. For the project team, changelogs provide a way to track the development of the project, making it easier to manage the project and plan for future changes.

Creating a Changelog

Creating a changelog is a straightforward process, but it requires diligence and consistency. The first step is to decide on the format of the changelog. While there's no standard format for changelogs, most of them include the version number, release date, and a list of changes.

Once the format is decided, the next step is to document the changes for each version. This involves writing a brief description of each change and categorizing it under the appropriate heading. It's important to write the descriptions in a way that they are understandable to the users, not just the developers.

Best Practices for Writing a Changelog

When writing a changelog, there are several best practices to follow. Firstly, always write from the user's perspective. The changelog is not just a technical document for the developers, but also a communication tool for the users. Therefore, it's important to write in a language that the users can understand.

Secondly, be concise but comprehensive. Each entry in the changelog should be brief, but it should provide enough information for the users to understand the change. Avoid using technical jargon as much as possible, and explain any technical terms that you have to use.

Tools for Creating a Changelog

There are several tools available that can assist in creating and maintaining a changelog. These tools can automate the process of generating a changelog, making it easier to keep it up-to-date. Some of these tools include 'git-chglog', 'github-changelog-generator', and 'auto-changelog'.

These tools work by analyzing the commit history of the project and generating a changelog based on the changes. They can be configured to categorize the changes based on the commit messages, and to exclude certain types of changes that are not relevant to the users.

Using a Changelog

Using a changelog involves reading and understanding the changes listed in the document. The changelog is usually located in the root directory of the project, and is often named '' or 'HISTORY.txt'. It's typically updated with each new version of the project, and includes a list of all the previous versions and their changes.

When reading a changelog, it's important to pay attention to the version number and the release date. The version number can give you an idea of the magnitude of the changes, and the release date can tell you how recent the changes are. Furthermore, the list of changes can provide valuable information about the new features, improvements, and bug fixes in the new version.

Interpreting a Changelog

Interpreting a changelog involves understanding the significance of the changes listed in the document. This requires a basic understanding of the project and its features. For example, a change listed under the 'Added' heading indicates a new feature or functionality, while a change listed under the 'Fixed' heading indicates a bug fix.

It's also important to understand the versioning scheme used in the project. Most projects use semantic versioning, which involves three numbers separated by dots (e.g., 1.2.3). The first number is the major version, which is incremented when there are incompatible changes. The second number is the minor version, which is incremented when there are new features that are backward-compatible. The third number is the patch version, which is incremented when there are backward-compatible bug fixes.

Benefits of Using a Changelog

Using a changelog has several benefits for both the users and the project team. For the users, it provides a clear understanding of the changes in the new version, which can help them make informed decisions about whether to update to the new version. It can also help them troubleshoot issues by looking at the changes made in the version they are using.

For the project team, a changelog provides a way to communicate the changes to the users in a clear and organized manner. It also provides a historical record of the project, which can be useful for understanding the evolution of the project and for planning future changes.


In conclusion, a changelog is a vital tool in product management and operations. It provides a clear and organized record of the changes made in a project, serving as a communication tool for the users and a tracking tool for the project team. By understanding what a changelog is, how to create one, and how to use one, you can improve the management and operation of your projects.

Whether you're a developer, a project manager, or an end user, understanding changelogs can help you navigate the ever-evolving landscape of a project. So the next time you come across a changelog, take the time to read it and appreciate the journey that the project has taken.