Keywords are simply those words you type into the search box to get the results you want. Just like in Google, you don't type your whole question, just the important words or terms that will help you get the answers. You must remember to treat the search engine like a computer. Use nouns (people, places, things, ideas) instead of verbs (actions). Verbs and adjectives (descriptors) are about relationships between things and search engines don't understand that.
Creating a list of more than one keyword or phrase is important. The images below are strategies to help you develop and create a list of keywords. One strategy asks you to think about synonyms and broader and narrower terms. The other asks you to think about your topic, parts of the question you ask, and to add keywords you start to learn the answer as you research.