Site Reliability Engineering (SRE) uses software engineering to automate IT operations tasks. The word ‘Reliability’ signifies an SRE with a particular position in an organization. They focus is on creating and maintaining dependable web services that are up and running 24 hours a day, 7 days a week.
DevOps teams are focused on core development. But SREs are working on the implementation of the core. They are constantly giving feedback back into that core development group.