Zapier allows you to construct workflows that can conduct several actions based on a single trigger. You can add more stages to any Zap at any moment as long as your plan level allows you to build multi-step Zaps. If you already know what steps you need, you may add them when you create the Zap, or if you conceive of a new task later, you can add it to the middle or end of any current Zap.
You can add as many steps to your Zap as you need to make it function best for you. The more stages you add to a Zap, the less manual labor Zapier does for you and the more time you save.