When do you use "Cela est" instead of "C'est"?

Bonjour Emily !

"Cela est" can be used but would sound overly pompous, and nowadays you would only encounter it when people are making fun of a "posh" accent, as no one would use "cela est" in an non-ironic way these days.

Bonne journée !

Bonjour Ivo ! You never really use "Cela est" as the contraction "c'est" is done for pronunciation reasons: it's just easier to say "c'est", no one ever say "cela est" :) I hope that's helpful! À bientôt !