ID3 is a metadata container most often used in conjunction with the MP3 audio file format. It allows information such as the title, artist, album, track number, and other information about the file to be stored in the file itself.
If the validator tells you that your ID3 Tag is missing, we recommend using a trusted editor to add it.
The lack of the ID3 Tag is not an impediment on most platforms to add your feed. If you have any problem adding your feed to any platform through this tag, write us.