I am using a simple theme 'Primer' but I want the Permalink to display on every page.
Should I insert the get_permalink() function in the page file?
I am concerned that I will break the entire theme because I can't try this in a sandbox and I know nothing about placement.
Can you clarify what you mean by "I want the Permalink to display on every page"?
Not sure what it is you want to do... 😉