Some online courses or groups of online courses have certs associated with them. Some don't. Whether those certs are worth anything from a job hunting perspective is going to depend on the cert and who is looking at them. Very situationally dependent.

I was specifically speaking with regard to this offering. AWS has a pretty mature certification program (though I think was recently outsourced), so I figured they would have some sort of certification track to motivate people to consume their educational resources.