How can we access Installed Packages in Salesforce?

To access the package detail page, from Setup, enter Installed Packages in the Quick Find box, select Installed Packages, and then click the name of the package that you want to view.
From this page, you can:
Click Uninstall to remove the package and all its components from your Salesforce organization.
Click Manage Licenses to assign available licenses to users in your organization. You can’t assign licenses in Lightning Experience. If you need to assign a license, switch to Salesforce Classic.