Tag in bulk: tag 100+ items in a list in one go

I have a simple question
How can I tag a bunch of items of a all at once?
The list interface does not allow a selection of items to be tagged. I can assign them change their attributes; but not give them a tag

We are also planning to use Tags more fequently in our work and wanted to check if there is any workflow from front end where we could update the Issues in Support module in bulk based on certain filter conditions …