Global templates are page templates that are available in every space on your site. As a site administrator, you can control which templates are available globally, edit existing templates, create your own, and even install new ones from the Atlassian Marketplace.
For information about using templates or managing space-specific templates and blueprints, see Page templates.
What’s the difference between a template and a blueprint?
Blueprints are templates created by Atlassian or by third-party developers. From an end-user perspective, blueprints and templates are the same, but there are some important differences for administrators.