There have been a spate of these recently. A message from a Friend (and it is the actual account, not a clone) asks you to look at video (for example).
I got this twice from Friends. I experimentally followed the link with a fake account which I keep around for these situations. It craftily asks you to log into Facebook in order to see the video or whatever. Your email and password are then captured! This lets the scammer masquerade as you and get up to no good.
The Friends who apparently sent me the message had been caught by the same trick so it’s a chain reaction.
Implications go further. If you use the same password everywhere then they can get access to your email and more and get up to even more mischief.