This app can be installed through the Atlassian Universal Plugin Manager (UPM):
Login as Administrator
Click on Settings on your Confluence Cloud instance
Click Find new apps from the left-hand side of the page
Locate Include Bitbucket for Confluence via search
Click free trial
As an Alternative, if you have admin permissions, you can click on the Try it free button in the Marketplace.
Not on Cloud? Visit our documentation for Include Bitbucket for Confluence Data Center.