Final answer:
A focus group is a small group of invited persons who actively participate in a structured discussion to elicit their input. They are used in political campaigns to gather voter opinions.
Step-by-step explanation:
A focus group is a small group of invited persons (typically six to twelve) who actively participate in a structured discussion, led by a facilitator, for the purpose of eliciting their input.
Focus groups are often used in campaigns to gather voter opinions about candidates and the election. They bring together representative individuals to gauge their reactions to things like campaign speeches, debate performances, and ads.