What are keywords? 
Keywords are key concepts/ideas that are found within your research question or thesis statement. These are the words you will use to conduct your search.
Why use keywords?
Databases function differently from search engines such as Google. If you type a full sentence into the search bar, you aren't likely to get any results. The database search engine is designed to search results for every word in the query. Keep your searches as simple as possible by using the words that are most important to your topic.
Generating Keywords
Some of the first possible keywords for your search can be found in the research question by choosing the most important aspects of the research question. Let's look at a few examples:
How does caffeine affect the memory of college students?
Is using a cell phone while driving dangerous?
Does racial profiling against black men in America play a role in increasing poverty within black communities?
In the questions above, the central ideas of each topic are noted in red. Instead of typing the whole question into the search bar, we should use the red words as keywords.
Generating Additional Keywords