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Click the ellipses (…) that appear when you hover on the end of the keyword row.
Select Delete form the menu that appears.
The keyword will deleted.
Deleting All Keywords
You have the option to delete all the keywords added to an entity type. This is done on the main page for the entity type.
Select Content.
Select Entity types.
Select the entity type that contains the keywords you want to remove.
Select Edit in the Keyword proximity section. The button becomes ellipses (…)
Select the ellipses.
Select Delete all keywords from the menu that displays.
Select Yes when prompted to confirm you want to delete all keywords.
Exporting the Keywords
Use the Export list link to export the keywords to a words.csv file. You can use the list as a reference for the keywords added to the entity type, or you can edit the file by adding and/or removing keywords and then uploading the edited list to the entity type to make changes to the existing keywords.