After taking classes you need to practice the acquired skills. You need this experience to pass the exam. This is a required condition. Make sure you are aware of the level of experience and topics of the test and go ahead in studying the product.
The next step is taking certification courses
that prepare you for the exam. You will get to know how the exam is going on, receive valuable advice from an insider, answer questions similar to those at the exam, and get helpful guidance.
You also need to read product documentation
by Atlassian to study it inside-out, learn the descriptions of functional features.
It would be very helpful to join the community of your peers, people who are going to take a certification exam. Chat with them, read their answers to questions you have and share your knowledge as a member of the Atlassian community
When you are ready to take the exam, look for your certification, take simple steps to set up a personal account and register via certification portal
Taking an exam and getting certification from Atlassian is only an initial step. After that, you can continue earning badges. Those badges assert that your product knowledge is getting stronger. When you have your badge, certifications are prolonged by 18 months.
Atlassian certification has four levels. Earn any of them and you become an acknowledged certified master. You can enjoy this status while the certification is valid.