Smiling is essential when you’re on stage, but it’s much more critical if you’re doing a virtual session with the camera turned on.
I’ve seen a lot of webinars and virtual sessions in general, where most of the people completely forget that we’re humans, and we need eye-contact, and even more, we need to interact with someone confident, and smiling can give you a quick confidence boost.
I’m not saying that you’ve to laugh all the time, but, if appropriate, always wear your best smile, to send a visual message to your viewers. You won’t regret it.
P.s. Of course, there are sessions where a gorgeous smile is wrong, especially in these dark days. It’s up to you to decide if it’s ok or not to do it, and sometimes, instead of having a sad face, it’s better to keep the camera turned off.