How does AWS Data Pipeline run an EC2 instance?

I have an AWS Data Pipeline built and keep getting warnings on an EC2 resource's TerminateAfter field being missing. My DataPipeline is designed to use the same instance various times throughout the entire process, which is to run every hour (I haven't run the pipeline yet).

So if I set the Terminate After field to 3 minutes, I'm wondering if the EC2 instance is terminated 3 minutes after every time it is spun up. Or is the EC2 instance terminated 3 minutes after the last time it is used in the pipeline?