From the Contributors pane, you can click a checkbox to show the Tags that have been added for each contributor.
Navigate to the Contributor pane by clicking: Hamburger Menu > Manage Contributors.
The page that opens displays contributors in a vertical list with columns containing information about each.
You can display the Tags that have been added to each contributor by clicking the Show/Hide Columns icon at the top right of the column area and then clicking the checkbox next to tabs.
A column will then appear to display any Tags that have been added to each contributor.