What

When you configure a keyword group, for when you want to add keywords to a specific content type, there is a field named Description which can be filled in:

This will add a helptext to the keyword group in the content, like this:

How

1. Go to Administrator > Keywords
2. Add or edit an existing keyword group
3. Fill in 'Description'-field
4. Save

Open the content type the keywords are related to and verify the help text shows when you hover the mouse on or click the symbol.

More information

KB-718 Add keyword group to content
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