Johan is an advertiser at a consumer electronics brand.He wants to understand the impact of his advertising by comparing changes from 30 days before the campaign to 30 days after.Which of the following would help him understand this?

Retail insights provide a comprehensive view of sales performance, including changes in sales volume, units sold, and other key metrics over specific time periods. By comparing these insights from 30 days before the campaign to 30 days after, Johan can directly assess the campaign's impact on sales and identify trends or shifts in consumer purchasing behavior. Purchase frequency insight would only show how often customers buy, not the overall sales impact. An overlap report would show audience commonalities between campaigns, not sales performance over time.