A couple of improvements rolling out now regarding Teams meetings
Meet now
From Calendar in the App bar you’ve always been able to start an instant meeting by clicking on ‘Meet now’. When you click on this button now, Teams asks you if you want to get a link to send to people you want to meet with:

Clicking on ‘Get a link to share’ generates a Teams meeting link which you can copy or share by email:

Clicking on ‘Start meeting’ works like the old ‘Meet now’ button and opens a Teams meeting where you can invite people to join you.
Provide a link for people to join your Teams meeting
From the Participants panel in an open Teams meeting you can now create invites to add people using the ‘Share invite’ button:

Clicking on this allows you to copy a Teams meeting link to share via Chat, for example, or to send the link using your default email program:

These new sharing options for Teams meetings is rolling out now.