Where do customers expect to see timers?

As an e-commerce business owner, I'm looking to understand the most effective placements for countdown timers that will genuinely capture customer attention and drive urgency without feeling intrusive. I want to know the specific locations on my website and during the customer journey where timers will feel natural and compelling, ultimately boosting conversion rates. Understanding customer expectations around timer placement is crucial for creating a persuasive yet non-aggressive promotional experience.