Click on a Join meeting link that you received in the email. This will open a new tab in your browser. Zoom meeting links will look like this: "https://drexel.zoom.us/j/87*******84" or "https://us04web.zoom.us/j/76***51?pwd=a0***9"
Click on "Launch Meeting".
Click on "Allow." It will automatically open zoom application for you and you'll be in the meeting.
If you get "Invalid meeting ID" error, then it means that the link that you received has the wrong meeting ID, or the host of the meeting has already ended meeting for all. In this case, please reach out to meeting host, and ask for meeting link again, or ask host to schedule/make a zoom meeting.
How to Share your Screen - Written
Click the green "Share Screen" button on the meeting menu bar
or... Type "Alt + Shift + S" (on Windows). or... Type "Command(⌘) + Shift(⇧) + S" (on Mac).
When the share window appears, select the source you wish to share, and then click "Share" button from the bottom right.