Reza Rad has everything under control:
In Microsoft Fabric, the Data Factory is the workload for ETL and data integration, and the Data Pipeline is a component in that workload for orchestrating the execution flow. There are activities in the pipeline, and you can define in which order you want the activities to run. In this article and video, you will learn about the execution order and output states in Data Pipeline and how they can be used in real-world scenarios of data integration.
The mechanisms here are fundamentally similar to what we’ve had in Azure Data Factory (obviously) and SQL Server Integration Services.