Keywords are relevant words that help identify or relate with the subject of your class. Keywords are like tags.
Students while searching for a class type some words in the search box and if those words match with the keywords mentioned by you, your class shows up. So, it is important to write good keywords and make your class easily searchable.
Say, you have scheduled a class to teach “Renaissance Movement – a turning point in history”, then relevant keywords will be - “History, renaissance movement, modern history”.
You can add up to three keywords while scheduling your class.