Users with the Edit permission can update any information in the File Info panel.
Editing and Batch Editing File Info:
Users with the Edit permission can update any information in the File Info panel and can batch edit File Info on up to 50 assets at a time.
Simply highlight all assets you wish to Edit with our lasso, or by holding the 'Shift' or 'Command' keys. While the files are highlighted, update the relevant information in the File Info panel.
If you select multiple files, it will show Common file info, including Tags: