https://www.youtube.com/watch?v=PCPlh6oeuSQ
Remember these helpful hints when using Zoom Conferences:
Send your Zoom link through e-mail rather than posting it on your blog or social media. Anyone with your link can join a meeting.
Before the meeting, make sure that only the host can screenshare.
Think about trying the “waiting room” feature of Zoom. – This prevents people from joining the meeting before you do.