If you're using Google Calendar with a Workspace account, you can use the "Appointment Schedule" feature:

1. Open Google Calendar

2. Click “Create” → Select “Appointment schedule”

3. Set your available time slots (e.g. weekdays 10am–2pm)

4. Customize duration, buffer times, etc.

5. Google will generate a booking page link (e.g. https://calendar.google.com/book/yourname)

6. Share that link with others so they can book time directly based on your availability

If you don't want people booking directly, you can share your availability like this:

1. In Google Calendar, create a temporary event showing your available times (e.g. “Free for a call: 10–11am”)

2. Click on the event → "More actions" → "Publish event"

3. Copy and share the public link (it will only show that specific event).