The Office Graph is a data driven technology that's based on user identities and activity. Among the many things it can be used for is showing site or page suggestions that might interest you based on your viewing history or interaction with others in your organization.
You can use the Office Graph through Delve, an Office 365 user app. With Delve, you can manage your Office 365 profile and discover and organize the information that's likely to be most interesting to you.
SharePoint start also uses the Office Graph to make it easier for you to find the information relevant to you. When the Office Graph is turned off, the information you see in the Suggested sites section of SharePoint Online start can be limited. The Office Graph can be turned off for the entire organization, and each user can also individually turn off the Office Graph.
How do I know if the Office Graph is turned off?
By default, the Office Graph is turned on for SharePoint Online. When you visit SharePoint Online start page and the Office Graph is turned off, you'll see the following message:
You’re seeing a limited version of this page because the Office Graph is turned off or it’s not available.
Can I turn the Office Graph off?
No. If your administrator has enabled the Office Graph, you can't turn it off completely. However, using Delve, you can choose to not have your documents included with suggestions. To turn off document usage in the Office Graph and Delve, follow these steps:
Open Delve from your Office 365 start page.
Click Settings , and then click Feature settings.
Under Feature settings, you can disable your documents from showing in Delve.
The Office Graph is enabled or disabled for your entire organization through the SharePoint Admin center. If you're an admin, see Office Delve for Office 365 admins for more info.
Both Delve and SharePoint use the Office Graph and there isn't a way to allow the Office Graph to be on for one and not the other. To learn more about Delve, see What is Office Delve?
I want to turn the Office graph on or off for my organization
This is something only your organization's administrator can do. It's controlled through the SharePoint Online admin center. If you are the SharePoint admin, see Office Delve for Office 365 admins. If you're not an admin, contact your admin and give them the same link.
The Office Graph is on, but I still see this message
If you verified that the Office Graph is on and you still see this message, it is possible that SharePoint was unable to connect to the Office Graph service. This is typically a temporary problem, so please try again later. If the problem doesn't go away, contact see Get help and support for support options available to you.
To learn more about SharePoint start page experience, see Discover content with the SharePoint start page.
To learn more about the Office Graph, see Office Delve for Office 365 admins.