Is Online MBA useful for someone aiming at management roles — specifically about higher studies?

Yes. A degree can form the academic base for further study, subject to the admission rules of the next institution. The best next step depends on whether you want deeper specialisation, management education, research, or a professional certification. Current online programme information describes the MBA as a two-year postgraduate route and lists areas such as Marketing, Finance, Human Resources, Operations and Management, and Business Analytics & AI.