When prompted with this question, you must decide how you want this template to behave.
Cloning a template is basically just copying the text and pasting it into a new template.
Linking the template will link the local template to the master template. Any changes made to the template locally within a sequence will change the global template throughout Outreach. It also keeps the statistics on opens/clicks/replies consistent throughout the platform.
You can always unlink a template by clicking here: