in what situations can zoom web meetings be used?

Zoom can be used for a wide range of purposes as shown below.
・ In-house meetings/meetings
・ Meetings/presentations with external customers
・ Meetings/meeting participation from outside
・ Working from home
・ Seminars ・ Study sessions
・ Follow-up/information sharing of field workers




Please tell me the difference from video conferencing.
Please tell me how to hold a meeting.
What is the difference between signing up and signing in?

Please tell me about the initial work after the contract.
What should I do after receiving the invitation email from the administrator?
Is it possible to change my email address?
How is it different from free tools such as Skype?