Zoom app https://zoom.us is a popular app for holding meetings, webinars, etc. You need to know the address of the Zoom channel to log in, but if your work place holds meetings on Zoom, logging in with your work email should gain access most of the time.
It has become popular with religious services recently as shelter in place has increased. Saw a Zumba exercise program using it not too long ago. At least one court system is using it for divorce proceedings.
There are some upsides and downsides to using it – https://www.trustradius.com/products/zoom/reviews?qs=pros-and-cons. One of the biggest issues is lack of encryption. A recent case was where a politician in another country took a picture of a meeting that showed the name of the Zoom channel. Recommended to mute your side if you are tuning in where you are not going to need to contribute. I have not used the app or Windows version yet. I know several bloggers who have used it and they like it.
Going forward it will come in handy after shelter in place ends. I worked for an hour agency that had almost a dozen satellite offices in Kansas, ranging from the far corners of the state in all directions. At the time, Zoom wasn’t an option so employees would have to travel to Wichita for meetings. This meant travel costs, per diem, and lodging costs, plus renting a venue for the meeting.
There are cheaper options if you don’t need interaction. Facebook Live is free and being used by many groups.