By default Prime hides the page breadcrumbs when applied to a SharePoint site, however they can easily be shown again using the Prime Stylizer. Here's how:

  1. Open up the Prime Stylizer from Site Settings > Prime Stylizer. If you're not a member of the Prime Stylizer Administrators group, you can add your user from Site Settings > People and groups > More... (under Groups heading on side bar) > Prime Stylizer Administrators.

  2. Once the Stylizer is open, scroll down the style panel to the Breadcrumbs section or the Page Title section. To show the breadcrumbs, update the Show Page Title option to Show instead of Hide. If you'd also like to show the Page Title and Page Description, update the Show Page Name and Page Description options as well.

    These options are shown highlighted in green in the image below:

  3. That's it. You'll now see the breadcrumbs at the top of the page, below the navigation like so: