Worked on enhancing the apache/doris-website repository by consolidating and clarifying documentation for the Pipeline Execution Engine, Workload Management, and Resource Groups. Focused on improving the structure and readability of technical guides, the work involved updating terminology, refining explanations of pipeline execution concepts, and providing detailed guidance on isolation, concurrency, circuit breaking, and resource partitioning. Used Markdown and technical writing skills to align documentation with recent code changes, ensuring consistency and accuracy. These improvements aimed to streamline onboarding for new users, reduce support overhead, and create a more cohesive reference for developers and administrators working with Doris systems.