Search Nodes are a new feature in MongoDB's Atlas, providing dedicated infrastructure for Atlas Search and Vector Search workloads, allowing for better performance at scale, workload isolation, higher availability, and optimized resource usage. This feature addresses the limitations of co-locating search and database resources on Atlas Nodes, introducing potential issues such as resource contention and difficulty in setting limits on shared workloads. With Search Nodes, developers can now fully scale search independent of database needs, delivering a more controlled and efficient experience for their most demanding workloads.