https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000Clt5CAC

To create an address object, perform the following steps:
1. Select Objects > Addresses and Add an address object by Name. The name is case-sensitive, and the name must be unique. There is a limit of 63 characters (letters, numbers, spaces, hyphens, and underscores).
2. Select the Type of address object.
3. Enter a tag to apply to the address object.
4. Commit changes.
5. View logs filtered by your address object.
6. View a custom report based on your address object.
7. Use a filter in the ACC to view network activity. Select ACC > Network Activity.

Antivirus Security Profiles protect against viruses, worms, and Trojans, along with spyware downloads.

You can check application categories on:
https://applipedia.paloaltonetworks.com/