AZ-103 is an exam that you need to clear to get a Microsoft Azure administrator certification. AZ-103 is a new exam that started on May 1, 2019, replacing AZ-100 and AZ-101.
Microsoft azure administrator certification adds a lot of value to your resume. It helps you in getting a job as an Azure administrator. Clearing this AZ-103 exam would be difficult without any training from some professionals.
If you want to get this Azure Certification, I suggest you this course on Azure training by Intellipaat
You can watch this video to know about Azure Administrator training course and for the quick start with Azure: