Final answer:
By default, Power Search will run a basic search, retrieving results that contain at least one of the keywords entered.
Step-by-step explanation:
By default, Power Search will run a basic search. This means that it will search for your keywords without any special operators like AND or NOT. It will retrieve results that contain any of the keywords you entered. So, if you enter multiple keywords, it will retrieve results that contain at least one of those keywords.