All G Suite users receive a dedicated calendar based upon their own user account which is typically used to manage their own schedule and activities.
You can also create other calendars, for example to track team schedules and manage projects.
In Google Calendar:
The new calendar appears under My calendars.
You can then use the Settings options to share with colleagues, assign rights for others to co-manage this Calendar with you.
You can create as many calendars as you require this way.