Reza Rad disambiguates three terms:
Three types of objects in the Microsoft Fabric have similarities in what they can do for an analytics system. These three are; Lakehouse, Data Warehouse, and Power BI Datamart. All three objects provide storage for the data, which can be loaded into them using an ETL process and read using something like a Power BI report. In this article and video, I’ll explain the actual differences and how to choose the best option for your implementation and architecture.
Reza does a good job explaining when each of the three fit in and even has a nice chart to work out which one you might want to use.