Your team manages a retail website that customers arrive at from a variety of places including social media, ads, and search engines. Which of these dimensions would you look at to determine whether your website traffic was coming from "organic search," "referral," or other areas?

The "Default channel grouping" dimension categorizes traffic sources into high-level groups like "Organic Search," "Paid Search," "Direct," "Social," and "Referral." This allows you to quickly see where your website visitors are coming from at a glance. "Event name" tracks specific user interactions on your site, not the source of their arrival. "Google Ads campaign" would only show traffic from your Google Ads, not other sources like organic search or social media. "Page title" identifies the specific page a user is viewing, not how they arrived at your site.