There is a counter-signaling effect. The people who are so good that they do not need a certification to prove themselves, do not get one. So getting one is a

There is a counter-signaling effect. The people who are so good that they do not need a certification to prove themselves, do not get one. So getting one is a signal that you have something to prove. That said, it's good for juniors who really do have something to prove. And consultancies like to show lists of certifications of their employees.