Focus groups help you generate ideas by listening to your current and prospective users discuss their experiences and expectations with one another. Focus groups can provide:
Explanations about user values and preferences that can clarify the analytics/surveys you have already
Feedback about problems or issues with an existing design or feature
Feedback about interaction with a service
Reaction to an idea for a feature, application or service
Reaction to the look of a design
Generation and brainstorming of ideas for new functions or improvements