These days Google is concentrating more on its openness allowing users to customize everything much to the extent in every of its products. These lucrative practices of Google grab more fans for it and its products making it a global leader.
Coming to the post, when you are signed into Google with your Google Account and browsing through the web pages of Google and its products, to name a few like Google Home Page, Google Search, Gmail, Google Plus, YouTube, etc., you will find on the top right of the webpage a Google's Tool Bar. This Tool Bar contains a menu grid which contains shortcuts to all Google services i.e., Google's Products which will directly take you to your homepage of that service without need to login every time as you are already logged into the Chrome for the first time. Beside this menu there is a notification count which on click opens a drop-down list showing you the notifications you got from Google services. These can be a few which is okay, but sometimes they may bump up more and maybe unwanted which is really annoying sometimes for some users. To get rid of this, Google has added a settings icon to the left of the action bar of the notification drop-down list as shown in the picture above. When clicked on the gear icon it will show a list of services that are sending you notifications and a settings shortcut quite right of it which will walk you through the settings page of that service where you can get complete control over your services and make them behave according to your choices
Before, it was hard getting around the settings page of every Google service and tweaking them which used to waste a lot of time for the user, to get rid of those unwanted notifications. And now, more customization is possible within a few steps away.
The same strategy was also implemented in the Android 5.0 Lollipop and above where we can customize which app can send notifications at what time and at what profile. Those incoming notifications were called as interruptions and the feature is named as priority notifications. The same strategy was also implemented in the recent Android M Developer Preview where the user can customize the app permissions.