What is Apple's iCloud Keychain and how do I use it?

What is Apple's iCloud Keychain and how do I use it?: "Apple’s iCloud Keychain feature is the company's attempt to make a basic level of password management available in its iOS 7 mobile OS. It’s a convenient feature that keeps your account names, passwords, and credit card numbers stored in iCloud. Here's a look at what it is and how to use it."

'via Blog this'