A subject matter expert, or SME, is a senior team member with deep knowledge of a specific product, client account, or process, responsible for maintaining the training materials and knowledge base agents rely on as their first source of truth. An SME is also who less experienced staff go to with questions the documentation doesn't answer.

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‍Why it matters

Frontline agents can't be experts in everything, especially on accounts with complex or frequently changing products, so teams need someone whose job is specifically to stay current on the details and translate that into guidance everyone else can use. Without a clear SME, knowledge tends to live in individual people's heads rather than the knowledge base, which means it disappears the moment that person is unavailable.

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‍How the role shows up day to day

SMEs typically review and update guidelines and macros when a policy or product changes, sit in on calibration sessions to settle disputes about how something should be handled, and mentor newer agents directly rather than just writing documentation. A good sign the role is working is a declining rate of repeat escalations on the same type of question, since that means the knowledge actually made it into the team's shared resources.