Hi @darren _hunt,
Welcome to the community forums!
The best way to start is to ask and try to help other into the forums (so you're in the right path).
Regarding your question I understand you are using Magento 2, right? Also, that seems to be a customization since isn't an out-of-the-box feature. Can you share how you set that flag/attribute?
As you know, you'll find information on StackExchange too and you can start diving into the http://devdocs.magento.com/ not only for learning but to correct and improve the docs.
We can't forget the powerful User Guide: https://docs.magento.com/m2/ce/user_guide/getting-started.html.
Another recomendation could be to be aware of Magento issues on Github: https://github.com/magento/magento2/issues (if you are technical, of course).
Also, you should read this post: https://community.magento.com/t5/Welcome-to-the-Magento-Community/Start-here-and-hello-from-me/m-p/5... (in particular the guidelines) and if you are not sure about how to use the forum you can read the FAQ: https://community.magento.com/t5/help/faqpage.
If you need information related with GDPR, you should check this: https://community.magento.com/t5/help/faqpage/title/gdpr
Finally, you'll need to get your hands dirty with the platform.
Cheers.
