You can export the links and then reimport them with the tags/notes that you want. You don't need to remove the existing links when you reimport them - they'll just get overwritten. When you import the links (https://monitorbacklinks.com/importlinks), just make sure that you follow the sample that includes a notes column.

You should also experiment with a few links first to see that it gives you the effect that you're looking for. 

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