How do timers affect brand loyalty?

As an e-commerce business owner, I'm concerned about how countdown timers might impact my customers' perception of my brand. While these urgency-driven tools seem effective for conversions, I worry they might come across as manipulative or create negative emotions. I want to understand the psychological nuances of using timers, their potential long-term effects on customer trust, and how to implement them strategically without damaging my brand's reputation or customer relationships. Are timers a short-term conversion tactic or a sustainable marketing approach?