How can I customize which Gmail notifications are shown in the notification bar? I receive dozen of useless newsletters everyday from my school, at the same time the same addresses may send a few important e-mails that I need to read ASAP.

How can I setup the Gmail client and the Android notification bar in such a way that the bar will show new messages only of their title doesn' start with a certain string of characters?

ex. if the same address sends me a newsletter called "Campus news no. xxx" (with the exact title changing everytime) how can I have the notification bar NOT show any message starting with the string "campus news"?

(Android 4.2.2 with Touch Wiz - Samsung Ace 3 GT-7270)
You can filter messages based on sender, recipient, subject and other criteria from within the Web app. This is not possible from within the Android app. 


In a web browser, Goto [Settings] -> [Filters] of Gmail. Click on [Create new filter].
Create a filter to match your newsletters.





Assign a label to them (create one if you don't have one yet). Make sure to apply "skip the inbox (archive it)" such that this message only lands in that label, but doesn't land in your inbox triggering a notification.




Now go to label settings in the Android app and customize notifications for the "newsletters" label.