Which metric helps in measuring the effectiveness of a marketing campaign?

The selection of all metrics—customer segmentation, brand awareness, and customer engagement—as helpful in measuring the effectiveness of a marketing campaign is grounded in the comprehensive nature of marketing analysis.

Customer segmentation allows marketers to tailor campaigns to specific groups, improving targeting and thereby measuring effectiveness through tailored responses. By understanding distinct customer groups, marketers can assess which segments respond positively to the campaign, thus reflecting its effectiveness.

Brand awareness serves as a crucial metric since it indicates how familiar and recognizable a brand is to consumers. An effective marketing campaign should not only boost sales but also enhance brand visibility in the marketplace, and measuring changes in brand awareness can help determine the campaign's impact on consumer perception.

Customer engagement is equally important as it captures how potential and existing customers interact with the brand during a campaign. High levels of engagement can suggest that the campaign resonates well with the audience, leading to better outcomes in customer acquisition and loyalty.

Together, these metrics provide a holistic view of a campaign’s performance, encompassing targeting efficacy, brand perception, and audience interaction, making it clear why the correct answer is all of the above. Each component contributes uniquely to understanding the overall effectiveness of a marketing strategy.