# Inject Metadata tab

![ETL Metadata Injection Step Inject Metadata Tab](/files/JvpDGKsbNLGIFLuST9xE)

The columns of the table in this tab specify what fields in the template transformation are injected with metadata. The following table describes these columns:

| Column                        | Description                                                                                                            |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **Target injection step key** | The available fields in each step of the template transformation that can be injected with metadata.                   |
| **Target description**        | How the target fields relate to their target steps.                                                                    |
| **Required**                  | The source fields that are required when using the Delete or Insert/Update steps with the ETL Metadata Injection step. |
| **Source step**               | The step associated with the fields to be injected into the target fields as metadata.                                 |
| **Source field**              | The fields to be injected into the target fields as metadata.                                                          |


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