Set up shop

Unable to set up beyond registration for vendor. Seeks more than PGP and lack tech knowledge to comprehend. I need someone to instruct or guide me through this entry. I'm trying to set up an online shop and they are asking for bc address (got it), pgp info (got it) and some other bc pgp info I do not understand. I need someone to look at a screen shot and explain to me what they want and how I provide it (if I can). I have provided my own pgp code above this but don't understand multisig talk.