How chats with business Pages work
Change platform:Computer Help
When you chat with a business Facebook Page in Messenger, your private information is still protected. The Page may be able to see certain information you make public and use that information to interact with you.
How businesses use your information in Messenger chats
Pages can only message you after you start a conversation.
When you message a Page, they can see your public Facebook profile, like your name and profile picture. Pages can also use suggestions to reply to your messages faster.
You can control your privacy in Messenger by making certain information private or public to specific people. You can find these privacy settings on the Privacy tab of your Messenger account.
Control your privacy on Messenger