The first thing you need to do when designing your own automation workflow is to determine the type of trigger that will set your automation in motion. There are various types of triggers available - the "When some people don't open my campaigns" trigger will get your automation fired up when some people don't open a campaign. Please note that the automation will be triggered only for regular campaigns and not for automation campaigns.
There are two parameters that you need to define on this type of trigger:
1. You need to define the time that the workflow will wait before checking for non-openers of a campaign.
2. The second parameter allows you to choose between days/months/years, as a measure of time for the number you typed.
Note that you may notice a short delay added to the time you selected above. After you are done, just click on the Save button to have your trigger ready and waiting inside your workflow.
Keep in mind that the automation will start checking who didn't open your campaign from the moment you activate your automation. In case you deactivate and reactivate your automation, it will start checking who didn't open your campaign from the day you reactivate your automation and according to the time period you set.
This is the starting point for creating an automation that will be triggered whenever some people don't open your campaigns. Learning how the available Conditional / Control steps and the available Actions work, will help you finalize your design.