It's the easy-to-use interface.
The best part of Jira is its user interface. It's easy to use, and the interface is intuitive. The interface is also very customizable. You can change the colors and fonts to fit your style. You can also change the colors of your project and issue boards.
Jira is a web application, which means it's available from any web browser. You can access Jira from anywhere in the world.
You can access Jira from your desktop, laptop, tablet, or mobile device.
Jira has a free version, which is limited to 100 users and 50 projects. It's perfect for small teams.
Jira has a paid version, which is unlimited in terms of users and projects.