Select all of the locations you want to tag
Click ‘Batch’ and then click ‘Tag’
When you’ve clicked “List View” in the bottom-right corner of the map, you’ll see your locations as a list.
If you select locations by ticking the check-boxes, you can then click “Actions” > “Batch Tag” to apply or remove tags from multiple locations at the same time. You can also click “Select all” to select all the locations and perform a batch operation on all of them at the same time.