Dataflows are a feature within Power BI which is used to connect and transform data to utilize them as datasets when designing reports. It is a good way to create reusable datasets that are refreshed each time when a change occurs. They can be used by different users within a company to create reports not only in Power BI, but also in other Power Platform services.
Power Query allows you, whether you use Excel or Power BI, to connect to numerous data sources, retrieve, transform, and use “refined” data to create reports. On that occasion, each step in the transformation process is recorded and, when you refresh the link to the source, the steps are repeated in the given order and you get tables of identical structure. What is a purpose of Dataflows?
Workspace, as its name says, is used for the integration of data, reports and dashboards that is used in your daily work. The default workspace is called My Workspace and everything you create (datasets, reports, dashboards) is kept on this site, unless otherwise is specified. This post is word about how to create custom workspaces and use them to share content with other users. This functionality is enabled only in PowerBI Pro version.