There are many users today.
With this many users it is a burden on the room bandwidth.

 

So please switch off your microphones and switch them on only when you talk.
You can click on & off the Mic Icon to speak (All computer types) 

active mic   
Or

(Windows only)hold down your computer's [Ctrl] key when speaking (release it to stop).

(Mac only)hold down your computer's [F2] key when speaking (release it to stop).

Also please try to reduce web cam use too.

control button