Clutter is designed to help you focus on the most important messages in your inbox. It uses machine learning to de-clutter your inbox by moving lower priority messages out of your way and into a new Clutter folder. Ultimately, Clutter removes distractions so you can focus on what matters most.
How Clutter works
Clutter learns from your actions to determine the messages you are likely to ignore. As less important messages arrive, they are automatically moved to the Clutter folder. It gets smarter over time, learning from your prior actions with similar messages, and assessing things like the type of content and even how you are addressed in the message.
Getting started with Clutter
By default, Clutter is disabled for your inbox. Each person controls whether to turn Clutter on or off. You control Clutter from the Outlook Web App (OWA) options menu. You can turn it on as soon as Clutter is available for your Office 365 tenant. Clutter begins taking actions once it has sufficiently learned your work style and can confidently begin working for you. If you later find Clutter isn’t for you, it can be turned off any time.
Clutter is best suited and most effective for those of us who tend to pile up messages in our inboxes. Clutter respects your existing email rules, so if you have created rules to organize your email those rules continue to be applied and Clutter won’t act on those messages.
Working with Clutter
The less important messages are simply moved to the Clutter folder. They remain out of your way until you have time to review the items—if you choose to. You can proactively train Clutter by marking items as Clutter or simply move the items to the Clutter folder. If you find items in your Clutter folder that shouldn’t be there, train Clutter by moving the message back to your inbox. Clutter continuously learns and will adapt to your new patterns within days when you begin working on new projects or a new role. As you work with Clutter it will notify you of its activity in your inbox, this is Clutter helping you keep in control of your messages
The Clutter folder allows you to take advantage of the feature across many email clients including Outlook, OWA, OWA for devices, or EAS connected devices. Clutter continuously learns from your actions across these clients. Regardless of the client, the messages moved to the Clutter folder are out of your inbox view—yet readily accessible.
More information can be found in the following Microsoft blog post: https://blogs.office.com/2014/11/11/de-clutter-inbox-office-365/