Shared by Me view is a new OneDrive for Business feature and rolling out as a Targeted Release.
Gradually rolling out in March 2018.
Any file in your OneDrive that is shared will have a sharing link generated for it, or a pending external invitation which will show up in this view. Users can quickly manage access to these files by selecting one from the list and clicking “Manage Access". To find this new view in your OneDrive, click “Shared” in the navigation pane, and then click the “Shared by Me” tab.