What does OneDrive for business do?

Microsoft OneDrive for Business is a cloud storage service that makes it easy to store, share, and manage your files securely. It lets you access your documents from any device, collaborate with your team in real-time, and integrates with other Microsoft Office 365 apps. It helps streamline your workflow and keeps your important files handy and safe.

it can store all the documents, folders, pics, videos etc., from your device and store it, eventually you can acces them with your mobile too. features like backup while charging , auto backup is useful

It streamlines a variety of software tools and functions for teams. It includes shared/collaborative documentation tools (including documents, spreadhseets, forms, pdfs, imagesm etc). It is also very secure and allows file access control to be maintained at multiple levels so that only the appropriate team members have access to read/edit/share the appropriate documents. It also integrates with all other Microsoft tools like calendar, teams, word, powerpoint, email, etc.