Organizing your Triggers into folders is the best way to put things in place. It will make it easy for you to access Triggers for each campaign.
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Part 1: Creating a Trigger

Step 1: Navigate to Trigger → Add Trigger → Name your Trigger → Save → Fill out the form → Add Filter (if you want) → Save → Activate. See GIF

Step 2: Triggers → Choose the Trigger that you want to put in a Folder → Edit → Move to Folder → Choose the Folder → Check the Folder if you successfully put your Trigger. See GIF.