A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Analicia,
Yes, you are right. The Tags & Notes feature of SharePoint Online has been retired.
Regarding your requirement, you can choose to:
- Keep track of all the documents and sites relevant to you ( see Organize documents and sites in Office 365)
- Add an enterprise keyword to a SharePoint item to use for distributing the item to anyone following the keyword (see Add an enterprise keywords column to a list or library)
Besides, you can also choose to create a Managed Metadata column in SharePoint Online and add the column to your Documents library to create searchable metadata in SharePoint Online if you need. For your reference:
Create a column in a SharePoint list or library
Using site columns to create searchable metadata in SharePoint Online (Office 365)
Regards,
William