You already know about bonus travel miles and cash back rewards, but some credit card benefits stretch well beyond instant savings on a vacation getaway. Many credit cards include purchasing safeguards that protect against anything from rental car insurance to extended warranties. If you can't find your credit card policy or if you're confused by the jargon, call your bank or credit card provider to ask about the benefits you're entitled to. Taking the time to understand your credit card protection plan might determine when you use credit or cash on your next big purchase.