In my experience, SRE is more opinionated and measurably focused on reliability than general DevOps. DevOps is about breaking silos and improving the flow from development to operations, while SRE adds concrete guardrails through SLOs, SLIs, and error budgets that define how much risk the system can take. SRE teams act as “custodians of reliability,” using data to decide when to ship features and when to prioritize stability. Practices that helped most include defining clear SLOs per service, setting up robust monitoring and alerting based on user-centric SLIs, running blameless post-mortems, and aggressively reducing toil through automation and better runbooks. Regular capacity reviews and game days have also improved our readiness for failures, resulting in fewer outages and faster, more structured incident response.