If I send a message to a group of people, will they all see each of the others who have gotten it?

Question

If I send a message to a group, say 15 people from my messenger list, will each person see the other 14 people who it was sent to also or will they only see it is directed to them?

Answer 1

if you put the people in the BCC list they won't be able to see the other names. It stands for blind carbon copy.

edit:s oops thought you meant email.. umm no they shouldn't be able to see it, but i've never done that

Answer 2

I do not believe they will see the other's you have also sent the message to, via the messenger. I never see any but myself