Apple recently introduced two-step verification for your Apple ID in certain countries, and the process is now being expanded to the rest of the world. The feature, which requires two different codes for verifying your Apple ID (if you want to be extra safe) was initially only available in the US, UK, Australia, Ireland and New Zealand. But Apple has now included Canada in on the feature, as well as users in Argentina, Pakistan, Mexico, the Netherlands, Russia, Austria, Brazil, Belgium and Portugal. In other words, two-step authentication is now rolling out to a more or less worldwide release.
The authentication process is still optional -- if you don't think you need it, you can still stick with just your Apple ID password as a login. The process does help security, though it's still not a perfect solution. Apple only implemented this procedure earlier this year due to some security concerns on behalf of users. But it will help against some attacks, and it should work as another step to keep unwanted invaders out of your Apple ID account.