"When you begin typing an event title, you’ll see matching suggestions―choose one or keep typing," Google explained in a blog post. Tapping "at..." lets you add a location to your event and later get directions.
Similarly, tapping "with..." allows you to add people to your event - you can call or message them from the event, but can't send them an invite. Finally, tapping "on…" lets you specify the date, time and duration of the event.
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