private: No one can access your chatbot except you (your account)
can be embedded on website: Other people can chat with your chatbot if you send them the link. You can also embed it on your website so your website visitors are able to use it.
Limit the number of messages sent from one device on the iframe and chat bubble (this limit will not be applied to you on GetMyGPT.co, only on your website for your users to prevent abuse).