Hi Pavithra B,
Thank you for reaching out to us on the Microsoft Q&A forum.
A report in Power BI is a detailed, multi-page collection of visualizations, usually built from a single dataset. It allows for deep analysis with interactive filtering and slicing.
A dashboard is a high-level, single-page view that brings together visuals from multiple reports, making it ideal for quick insights and monitoring key metrics.
Dashboards are only available in the Power BI service, while reports can be created and viewed in both Power BI Desktop and the service.
If you are still facing any issue, please let us know in the comments. We are glad to help you.
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Thank you.