This article was first published on NerdWallet.com. You don’t have to be a numbers person to have a healthy bank account. But when it comes to savings, knowing a few key figures can help you maximize your options. Here are five numbers that can help you ...

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Online savings accounts have turned a few taps on a phone into a full banking relationship, often with higher yields than traditional branches and fewer fees. That convenience comes with a tradeoff: your money now lives behind a digital lock that criminals work hard to pick.

There are other options for saving for college, including regular savings or investment accounts, but 529s allow money to grow tax-deferred, and withdrawals are tax-free when used for qualifying educational expenses. That’s a significant advantage.