In the day or week view on your Google Calendar, click anywhere in the calendar grid.
In the pop-up, click Appointment slots and enter your details.
When you're finished, click Create slots.
Send the URL (at the top of the appointment slot details page) to anyone who might want to book an appointment.
Your appointment block shows as a single event on your calendar, with a grid symbol in the top-left corner. As people book appointments, they'll appear as regular events overlapping the appointment block.
End each email on a professional note with your contact info and organization’s logo. In Gmail, you can type everything just once, and choose to add the signature automatically to all future emails. To set up a signature, head to the gear , click Settings, and scroll to the Signature section. Learn more: https://support.google.com/mail/answer/8395