A trigger is an event that starts a Zap. Once you’ve set up a Zap, Zapier will monitor for that trigger event.
You want to set up a Zap that sends a direct message in Slack to yourself every time you receive a new email in Gmail. In this Zap, the trigger is the new email in Gmail.
There are two types of triggers:
- Polling trigger: the majority of triggers are polling triggers. With a polling trigger, Zapier will check for new data from your trigger every 1 to 15 minutes in order to start your Zap, depending on your pricing plan.
- Instant trigger: with an instant trigger, your trigger app will send Zapier an instant notification whenever there's new data. Zaps with instant triggers are labeled Instant on your dashboard.
Zapier relies on a few methods to make sure that your Zap does not trigger multiple times for a single "new" item. Learn more about how triggers are deduplicated in Zaps.