I have logged in to my account today, I have noticed the new “Recent messages” section in my AdSense account.
Adsense let me know that this is my personal inbox where Adsense will send me customized optimization tips. More specifically, their system will automatically analyze my account and ad settings. Based on these findings, I will receive a notification each month in my AdSense account if there are changes I can make to improve my overall AdSense performance.
There is no guarantee the tips will increase my earnings, but the tip will be worth looking into by me to see if there could be an increase in performance.
Have a great day and gud lak!
Source: You’ve got mail