Sending a text for every single event that happens somewhere else quickly turns into noise, and a customer who gets a message meant for someone else, or a text that fires on the wrong condition, is the kind of mistake that is hard to walk back once it has been sent. Filter by Zapier stops a Zap in its tracks unless the data matches a condition you set, so a text only goes out when it should.

In a Zap that sends an SMS through Mobile Message whenever a new email or order comes in, a Filter step can check the sender, the amount, or any other field first and only let the Zap continue if it matches. That keeps Mobile Message's Send SMS or Send SMS to List action reserved for the recipients and situations that actually warrant a text, rather than firing on everything that passes through the trigger.