Improving system reliability is crucial for businesses to maintain revenue, customer trust, and brand reputation, but it often competes with initiatives promising immediate returns like new product features. Site reliability engineers (SREs) highlight the importance of reliability, as it only becomes a priority for business leaders when it negatively impacts revenue and customer experience. To proactively manage reliability, businesses should link reliability improvements to key performance indicators (KPIs) such as revenue growth, cost reduction, and customer satisfaction. Metrics like uptime, Service Level Agreements (SLAs), mean time between failures (MTBF), and mean time to resolution (MTTR) are essential for assessing system reliability and their effect on business objectives. Reliability Management and Chaos Engineering offer strategies for testing and improving system resilience, helping businesses prepare for and mitigate potential incidents. These approaches allow companies to build a culture of reliability, improve low-level metrics, enhance customer satisfaction, and prevent costly outages, ultimately making reliability a competitive differentiator in online services.