Name your Audience Optimization metadata file according to these specifications.
The following syntax defines the structure of a well-formed metadata file name. Note, italics indicates a variable placeholder. The other elements are constants and do not change.
Do not use file extensions in your metadata files (.txt or other).
In the metadata file name, the child ID is an identifier that classifies the type of data in a file and places it into a hierarchy. You can tag the child ID in file name with the following category IDs:
For a Creative metadata file, the file name could be 20190115_0_2.