After you set up your Zap trigger, the next step is to add an action to your Zap. An action is a job your Zap performs when your trigger event occurs.
If you want to receive a Slack notification every time you receive a new email in your Gmail inbox, the Zap action is to send a direct message in Slack.
The action app is the app that will perform your task.
Next, customize the data that you want to send over to your action app.
In this step, you'll see dropdown menus and/or form fields to fill in. Some are required, while others are optional. Different fields accept different types of data—for example, dates, text or numbers—and there are three different fields types that may appear:
Dropdown menus: click the down arrow to select from a list of options.
Text fields: enter a value, or map data from previous steps. To map data, click the dropdown menu and select a variable from the list.
For example, if you're setting up an action to upload new Gmail attachments to Dropbox, you would map the attachment file from the trigger (New attachment in Gmail) to the action.
List fields: collections of text fields that let you send multiple values over. To send more than one item, click the empty field below the current field.
After filling in all required fields and any optional fields, click Continue to move to the final step.
The final step is to see if your action works as expected. The first screen will show you the data input for your action—that's the data that's being sent to your action app.
To run the action step, click Test & Continue.
The next screen will show you whether or not Zapier has been able to successfully perform the action step for you.
Click Done Editing.
Once you’ve set up your Zap action, you can add another action or finish setting up the Zap.
If you're on a paid plan or on your free 14-day trial, you can add multiple actions to a Zap. If you're on a Free plan, your Zap can only have one action.