Questions about My Maps location

Hello, I have some questions about My Maps location.
- What's the difference between tags and categories?
- Is there a limit in the number of tags?
- Can I import tags/categories via csv file or must they be added one by one?
- Can I import addresses without latitude and longitude?
- Can I hide some location informations (i.e. phone numbers and emails) forcing the site visitors to click on details to view them?
- In the demo version I saw that if no filters are chosen, all locations are showed in the list below or next to the map. Can I hide this complete list leaving only the pins on the map?
- Can I show results only for a single Region or Province?

Thank you.