Most developers who design and manage data processing on a daily basis work on a multitude of projects and modules.
Different sets of workflows and pipelines require management for at least development, acceptance, and production environments.
Every project or environment comes with its own set of variables and configurations for databases, file paths, etc.
In Apache Hop, metadata are objects used for the implementation of the data integration processes.
For example, if you need to extract or load data from a relational database, the connection to that database will be a metadata object in Apache Hop. This way, you can share the connection you can use within your project whenever you need it.
Apache Hop allows developers to manage different projects and environments with their corresponding configurations and variables.