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To craft a better invitation, click the "Copy the Invitation" button to the side of the Join URL. Copy the text in the window that appears and send that in an email to your invitees.

Re-Use Of Meeting IDs

About Meeting ID:
You can start your meeting at any time after you scheduled it. 
Non-recurring meeting ID will expire 30 days after the meeting is scheduled or  started. You can also re-start the same meeting ID within the 30 days.  
Recurring meeting ID will expire 365 days after the meeting is started on the first occurrence. You can re-use the meeting ID for future occurrences.  

Help On Zoom's Web Site

You can find more detailed instructions, including how to use the Zoom app to schedule and invite, on Zoom's comprehensive help pages.

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