If you've ever wanted to be able to trigger a zap just by clicking a button, then Push by Zapier is your answer. Installed as a Chrome extension, it gives your a dashboard of sorts, from which you can run your zaps.
Once installed, you just need to create a zap as normal and select "Push by Zapier" as the trigger step:
You can select "New Push" or "New Push With Fields" as the event type. The first just triggers the zap as soon as the button is clicked, the second lets you send data fields to your zap via text fields on the Push button.
With the zap built, when you want to trigger your zap, you can do that via the Chrome extension your installed:
In the video below, we walk through creating a zap with Push by Zapier. In our example, you push the button, input a name and email address and a new subscriber is added to Mailerlite.