These traits describe advantages of birth (or rebirth), circumstance and opportunity: material possessions, social networks and the like. Backgrounds are external, not internal, Traits, and you should always rationalize how you came to possess them, as well as what they represent. Who are your contacts? Why do your allies support you? Where did you meet your retainers? How exactly did you make enough money to justify your four dots in Resources? If you've put enough detail into your character concept, selecting appropriate Backgrounds should be easy.
Although it's uncommon to make rolls involving Background Traits, your Storyteller might have you do so to see if you can obtain information, goods or favors. For example, you might roll Wits+Resources to keep your stock options healthy, or Manipulation+Contacts to wheedle that extra favor from your smuggler associate.
Taken from Vampire: The Masquerade (Revised) P129
The Backgrounds available in Hollow Bridge are: