There are three different access roles that you can choose between when setting permissions on folders: Admin, Report and Initiate.
Essentially, someone with Admin access can edit everything about the templates and the tasks created from them.
Someone with Report access can't create or edit templates, but they can view the template, all tasks created from the template, and the report.
Someone with Initiate access can't create or edit templates or view the report, but they can view the template and view the tasks they create from it.
All access roles can create tasks from templates inside the folder they have access to.
What each role can and can't do in detail is listed below.
If templates aren't located in a folder, they will be visible to all members of the organisation.