It’s similar to “ça va”-how’s it going?but it’s usually used for an ongoing situation:the language course you have been doing,your relationship with your difficult boss.
Ça va?how’s it going
Ça roule bien?-how’s it been?
An answer would be: the course is good but I find spelling french words difficult.
It’s okay at the moment,he’s in a good mood today.
J’espère que ça vous aide.