title: Difference between object tags and object metadata?
body: <p>I'm looking for a way to include small pieces of data (from my server) with objects during the upload process (e.g. User ID, File ID, etc). After looking at S3 documentation, I'm not sure whether it's more appropriate to include this data as object tags or object metadata.</p>
  
  <p>Is the purpose of tags for categorization? And metadata for per-object data?</p>
  
  <p>What are the differences? What do you think would be more appropriate for this situation?</p>