The DATASETS area of Power BI holds the raw data that makes up your reports. When you left-click on one of your datasets, the designer opens to build reports from the dataset. The designer can be used to do the following things:

• Create more Quick Insights
• Create new reports
• Refresh or schedule refreshes
• Manage permissions
• Download the Power BI Desktop file (.pbix)

When you start with a dataset, users can create new reports from your data, even when accessing it through the web. The entire user interface will feel nearly identical to Power BI Desktop, but you will be lacking the ability to modify the model, query, and relationships. The best part of building reports here is that you have a central dataset that IT can own, modify, and make human-readable so that the entire organization can build reports off of it.