Neo4j is a high-speed graph database that offers two professional certifications, both of which are free, self-paced, and globally recognized. The Neo4j Certified Professional certification is for developers and architects working with Cypher, graph modeling, and transactional applications, while the Graph Data Science Certification is for data scientists, machine learning engineers, and anyone using graphs for analytics, predictions, and insights. To prepare for these exams, it's recommended to take courses such as Importing CSV Data Into Neo4j and Intermediate Cypher Queries, and to have a solid understanding of Cypher query coding and graph algorithms. The exams are non-proctored open-book exams that can be retaken every 24 hours, with the Certified Professional exam consisting of 80 questions within 60 minutes and the Graph Data Science Certification exam consisting of 40 questions within 60 minutes. To pass these exams, it's essential to have thorough notes, including literal copying of Cypher query code from both theoretical and sandbox modules, as well as having access to documentation during the exam. The certifications are not only a great goal to achieve but also demonstrate that you know something about Neo4j and are ready to apply it in real life.