The store you bought from, after you buy. They get your name, mobile number and delivery address, because that is what posting a parcel requires.
That is the whole list.
Who does not see it
Stores you have not bought from. Browsing, watching, following, chatting and bidding reveal nothing — a bid is not a purchase.
Other buyers. They see your public profile only. During an auction they can see you are the top bidder, by the name you have set. Can I bid without my name showing?
Anybody at all before you check out.
What the store sees, exactly
Your name, your number and the address, attached to that order. Enough to put a label on a parcel and ring you if the courier cannot find you.
Not your other orders. Not what you bought from anyone else. Not your email or your payment details — the card never reaches the seller.
What it is for, and the limit
It is given so a specific parcel reaches you. Using it for anything else — adding you to a list, contacting you outside the order, passing it on — is not allowed, and is reportable under Safety / report someone. How to raise an issue
For pickup
A pickup order gives the store less, because there is no parcel to address. You get their address instead, which is the published pickup point. What is a pickup point?
That is one reason pickup suits people who would rather not hand over an address at all.
Sending to somewhere else
You can. The address on the order does not have to be yours — a workplace, a relative, a gift going straight to someone.
The order stays yours, which is the important part: the tracking, the return route and the protections follow the account, not the doorstep. Can I pay for someone else's win?
Change it on the order before it is posted, not after. Can I change my address?
For sellers
The address on an order is for that order. Keeping a list of buyers to message later is the thing not to do — a store that does it is one report away from a problem, and the followers mechanism exists so you do not have to.
More: does Metzee sell my data, can I get a copy of my data, is Metzee safe to buy from.