You manage a retail website and customers arrive from many different places, like search engines, ads, and social media. You're interested in gaining insight to which of these is driving the most new customers and the most conversions. Which dimension shows you where your website users arrived from, such as "organic search" or "referral"?

Default channel grouping categorizes traffic sources into high-level, predefined groups like "Organic Search," "Paid Search," "Direct," "Social," and "Referral." This dimension directly answers the question of where users arrived from and is ideal for comparing the performance of different acquisition channels in terms of new customers and conversions. "Google Ads campaign" is too specific, only showing traffic from Google Ads, not all sources. "Page title" describes the content a user viewed, not their origin. "Event name" tracks user interactions on the site, not how they arrived.