You must have the Jira Cloud Administrator rights to be able to carry out the instructions on this page. You can learn more about this here.
Please take a look at the Supported Platforms section as well.
Step 1. Go to the Jira Cloud Manage apps section.
Press dot ( . ) on your keyboard. The search dialogue box will open.
( . )
Start to type “Find new apps” phrase. You’ll see a suggestion.
Click on “Find new apps” administration section. You’ll be navigated to the Jira Marketplace page.
Step 2. Enter “Smart Git Integration for Jira” in the search field, press Enter and find the application in the search result.
Click on it.
Step 3. Click Try it free to get a 30-day free trial license.
Step 4. In opened window click the Start free trial button. You'll be informed about the plugin installation process started.
You’ll be notified about successful installation.
You can easily access Smart Git Integration for Jira from the main navigation menu: Apps → Smart Git Integration for Jira.
Or from the Manage apps section.
You can also install Smart Git Integration for Jira Cloud directly from Atlassian Marketplace by visiting the application product page here.