As Microsoft continues to blend and expand Yammer capabilities across the platform, they have retired Tags and Notes in SharePoint Online.
Key factor to note is that users can no longer create create or access existing tags or notes. The only option is for SharePoint Online admins to export all existing tags and notes via an archived csv files, from the SharePoint admin center. Also, for those using this feature, the webparts will start showing up blank.
Below is the table of how this will affect users :
|Poll Results for What industry are you in?|
|Start Time: April 3, 2018 12:13:22 PM MDT|
|Total Responses: 222 of 428 (52%)|
|Answer||Total Number||Total %|
|Energy and Utilities||14||0.06|
|Financial Services and Insurance||47||0.21|
|Healthcare and Life Sciences||60||0.27|