Back in September, Google introduced the ability to add two-step verification for Google Apps accounts. What this means is that in order to log into your Google account, you not only enter your username and password, but you also enter an ever changing code. The code is sent to you by SMS, or can be found by using an iPhone, Blackberry, or Android app. This security feature makes it so that if someone finds your password by looking over your shoulder, phishing it, guessing it, or sniffing it from whichever network or computer you use, they will be unable to access your account, because they won't have access to this second factor authentication.
Now, Google just announced that they are rolling out the feature for all users. Over the coming days, a new option will appear in the Security tab of your Google Account. The feature is optional, and will allow you to use this option to better protect your account, either by receiving an automated call, SMS, or by using an app on your phone. This only occurs when you need to actually log on, which only happens on a new system or after a few months of use, so you won't need to do this every time you check your email. The process is not completely painless. The sign-up involves registering a backup number and one-time password, and you need to make special cases for apps which may need access to your Google account but do not support this feature, such as a desktop mail app. Still, it's a very good security measure, which everyone should look into.
Read More | Google Blog