How to Share a Profile
You decide you'd like to share some of your contact details with a contact of yours. You want to do this so that you know they will have these details on their phone going forward, and in future if you ever change them then they will be automatically updated on their phone.
Go to the person's contact card in your contact list. You can use the search bar to make it fast. Once you've selected them then you can see at the bottom of the page "Share My Details". Once pressed, it will ask which of your profiles you want to share with that person.