Acting and chemistry?

Question

When they talk about your chemistry (as an actor) with an another actor and how well it works or doesn't work, are they referring to how well you work together/work off of each other?

Answer 1

Yes because if you work well with your partner then onstage the chemistry will be seen because it shows that you are comfortable with your partner rather than not know the person at all and just talk to them like a complete stranger onstage and off-stage.

Answer 2

yes, and the strength of your onstage relationship also