If you want to email meeting attendees or event guests in advance, you can do so directly from Google Calendar. No need to copy and paste all those email addresses. Just click a button and type.
See also: Google Calendar: How to display work hours & your location

See also: Google Calendar: New feature shows how much time you spend in meetings
Send an email to event attendees on the Google Calendar website
Visit the Google Calendar website and select the event. You can email guests about the event on your calendar or on the event details page.
In your calendar, open the event and click the Email Guests icon.

Or on the event details page, click the Email Guests icon in the Guests sections.

A new message window will open with everyone's email addresses filled in for you. At the top, you may see options for who to send the email to, such as those who haven't yet accepted the invitation. Check the ones you want to include, type your message, and hit “Send.”.

The email will be sent from your connected Google account via Gmail.
Email event invitees in the Google Calendar mobile app
When you're on the go, you want easy ways to take care of business. Luckily, you can also email event invitees directly from the Google Calendar mobile app. The process differs slightly between the Android app and the iPhone and iPad app.
See also: Google Calendar: Will you attend the event virtually?
“Email Guests” on Android
Open the event in the Google Calendar app on your Android device. Tap the three dots in the top right and select “Email Guests.”.
You'll see some helpful suggestions, like letting everyone know you'll be there soon or letting them know they can start without you. You can also choose to write your own message.

If you have more than one email app on your device, you may be asked which one you want to use. Then, simply select the app and a new message will be created with the email addresses. Simply fill in the email and send it.

“Email Guests” on iPhone and iPad
Open the event in the Google Calendar app on iPhone or iPad . Tap the three dots in the top right and select “Email Guests.”
If prompted, select the email app you want to use. The new message will be created with the email addresses of the attendees. Unlike Android, you don't have quick suggestions, so you'll just type your message and send it.

The ability to email event invitees directly from Google Calendar is useful. You can make sure everyone is included and save time collecting all those email addresses.
And remember, if you just want to reschedule, you can suggest a new time for a Google Calendar event without emailing the team.
Information source: howtogeek.com
