A directed acyclic graph, or DAG, is a type of graph that consists of a set of nodes connected by directed edges, where the edges have a specific direction and the graph does not contain any cycles, or loops.
In the field of data engineering, DAGs are often used to represent the flow of data between different processing tasks. For example, a DAG might be used to represent a data pipeline, where the nodes represent different processing steps and the edges represent the flow of data from one step to the next.
The use of DAGs in data engineering allows data engineers to easily visualize and understand the flow of data through a system, which can help them design and build efficient and reliable data pipelines.
Overall, DAGs are a useful tool for data engineers, as they provide a simple, intuitive way to represent the flow of data between different processing tasks.