Apple has raised an iOS update with numerous improvements right after the 22nd Oct event. The firmware 7.0.3 bring several improvements and bug fixes. Talking about the bug fixes there are several of them like fixing several iMessage annoying issues, fixing iWork apps system stability, fixing VoiceOver input to be more sensitive.
With that the software/firmware update brings iCloud Keychain to keep track of your account names, passwords, and credit card numbers across all your approved devices.
Adds Password Generator so that safari can suggest unique, hard-to-guess passwords for your online accounts. And several new update.
In order to get your device update you can always sync your device with iTunes over a Mac or PC. Or you can simply do this by opening Settings app on your iDevice then navigate to General > Software Update. Tap Download and Install. It will update your device.