If you have been operating ServiceNow for six months or more, it is worth considering taking the exam. Not only does this formalize your experience and skills with a certification, but it also makes you more beautiful to your employer and future employers. They will know you are dedicated to your work and that you care about your Continuing Professional Development (CPD).
By achieving ServiceNow System Administration Certification, you prove that you have the required skills and knowledge to configure, implement, and support the ServiceNow system. The certificate also allows you to move onto the next stage as an Implementation Specialist if you so wish.