We have added a new course to our catalog of free online courses – Cypher Query Tuning 4.0, designed for experienced Cypher developers to learn best practices for writing performant queries. The course includes hands-on exercises and covers query tuning for graph data retrieval, as well as principles that can be applied to updating the graph. Key topics include understanding execution plans, reducing cardinality, optimizing property access, and monitoring queries. By completing this course, learners can gain skills to tune Cypher queries more efficiently, resulting in improved query performance.