What you have to do, considering you already have Google Analytics on your website, is going to the 'Integrations' step, choose Google Analytics and fill the following fields:
Then, go to your Google Analytics panel, add a new goal and create an event as you can see here:
Then, fill the goal details with the same titles as you did on the Viral Loops page, (in the "Value" field you don't have to input anything):
save it and you're ready to go!
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