The average corporate employee has many 'productivity' tools like Outlook, Slack, Teams installed on their laptops. The default setting of these apps is to notify you with a popup, sound and changing the badge of the icon on the taskbar. This is designed to improve the 'engagement' with the apps in question, but causes a big loss of productivity for most employees.
Imagine you are creating a presentation and an email popup drags you into Outlook. You have switched context and will need t spend more time when you come back to the presentation to pick up the threads from where you left it. Quite honestly, that email could have waited for an hour (or even a day) without any impact to your business. If it's urgent, train your colleagues to pick up the phone and call you.
I read 'The One Thing' by Gary Keller recently and decided to turn off all notifications - on Outlook, Slack and even my phone. As a result, I find myself focusing on the one thing that is in front of me. By reducing context switches, I've improved productivity and reduced the number of hours I have to put in to get the same work done. You should try it too.