The Neo4j Graph Data Science team has introduced a new certification exam for Neo4j Graph Data Science, which is designed to test skills in using the Neo4j Graph Data Science Library and performing analysis of graph data. The exam covers general use of the library, graph data science workflow, and specific graph algorithms. To prepare for the exam, developers and data scientists can take free online courses that cover topics such as Cypher, Neo4j administration, and graph algorithms. These resources will help individuals demonstrate their expertise in Neo4j Graph Data Science and become certified.