How to Keep CRM Knowledge, Data Definitions, and Documentation Consistently Updated?

Hey everyone, I'm struggling to keep the "knowledge layer" around my clients CRM current and aligned. Data definitions, field logic, process SOPs, what dashboards actually measure and why. It all ends up scattered across Notion, Google Docs, and notes buried inside dashboards, and it's outdated within months. How are you balancing keeping data definitions, process documentation, and business context up to date as things change? Are there actual tools for this, or is everyone just manually maintaining docs and hoping people read them? Thinking about building something if nothing exists.