Thank you. I've been spinning back and forth with Pinterest for a week on this matter...getting nowhere. I would even hire someone but we don't seem to have a resource here. Why would I place ads if I can't even get my "shop" set up to work...futile. I'm happy you posted.
@ajanmore and @flavourdesign hi both! To get the 'Shop' tab, you first need to create shopping Pins with catalogs. You can learn all about how to get your shop set up in this article. There's a few articles also linked there with info on catalogs, managing your shop and uploading your data source. Let us know if you have any more qs.