You probably remember problems caused by 2 hackers, who used people's iTunes accounts to buy their own apps from iTunes. Well, Apple has implemented a new security measure by which users are notified if their account has been logged in from a different computer than the one they are logged in to when they receive the message.
Let's say that I have an iTunes account and I use it constantly from my personal PC, well if this account was logged into someone else's PC then I will get the above message when I log into the account again . This is a measure by which Apple warns users about the logins made for that account, but Apple also gives users the opportunity to see the last purchases made to check if their account has been used by a foreign person to make unauthorized purchases.
It's a good measure that should warn users in advance about possible frauds.
