Category Taxonomy

How can I see what keywords I have previously set for a category’s taxonomy?

I have multiple categories I have attempted to set title keywords for, but how do I edit them once I have set them?

I am referring to the information from this page:
https://kb.wprssaggregator.com/article/306-how-to-set-up-feed-to-posts-taxonomy-options-categories-tags-etc

Thanks in advance for your help!