You can install Approvals for Confluence in two ways; through the Atlassian Marketplace or within Confluence using the Universal Plugin Manager (UPM).
For both methods, you will need your Administrator’s permission to install the app to your Confluence.
Search for Approvals for Confluence and click Try Now.
Universal Plugin Manager
Within Confluence, click Apps in the top navigation and click Find New Apps in the drop down menu.
Search for “Approvals for Confluence” and the app should appear in the search results.
Click Try it free and it will be added to your active apps.