Constant notification popping up on your desktop is the enemy of everybody who wants to get work done efficiently and every application seems to want to add it's notifications to your system whether relevant or not, why would I ever need a notification from an piece of image manipulation software?
However, it is extremely easy to just have the notifications you are interested in display and the rest be completely ignored, giving you a more productive working environment.
First, select the System Preferences icon, I keep mine in the dock for easy access (img.1).
Once the System Preferences window displays you will see a Notifications icon in the top right of the window, you should now click on this (img2).
The window will then display all of you applications with notification options on the left of the window and the actual notification options on the right.
You will now have to spend some time going through all of your applications that you do not want to receive notifications from, making sure all of the tick boxes are unchecked and the alert style is none (img.3). This will turn the notifications off for the selected application including sounds, banners, badge app icons and notifications on the lock screen.
Just leave the notifications on that you feel are essential and you will have a much more productive working environment.