There are two learning paths to gain the skills needed to become certified about MS-700. For more details, please refer to:
https://learn.microsoft.com/en-us/learn/certifications/exams/ms-700
The following link shows what you’ll need to know to pass the MS-700:Managing Microsoft Teams exam:
https://blogs.perficient.com/2019/12/01/ms-700-managing-microsoft-teams-study-guide/