SRE is how Google runs production systems, promoting high availability with high velocity and removing operational toil. It achieves the same goals as DevOps without the culture shift, so it's a better option for many digital transformations
Site Reliability Engineering is a set of principles and practices that supports software delivery - keeping production systems stable and still delivering new features at speed. In this course, SRE: Concepts and Principles, you'll get a fast introduction to SRE through practical demonstrations of the way SRE works and the tools that support it. First, you'll learn the differences between SRE and DevOps, and traditional operations. Next, you'll discover how engineering practices help to reduce toil and provide more time to focus on high value tasks. Finally, you'll see how SRE approaches monitoring and alerting. When you've finished with the course, you'll be able to evaluate SRE and see if it's a good fit for your organization.
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https://app.pluralsight.com/library/courses/sre-concepts-principles/table-of-contents