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Which dimension should you use to determine which sources, such as "organic search" or "referral," are driving users to your website?

You should use Session source / medium.

You should use Google Ads campaign.

You should use Page title and screen class.

You should use Session primary channel group (Default Channel Group).

Explanation

Analysis of Correct Answer(s)

The Session primary channel group dimension is the correct choice because it automatically categorizes website traffic into high-level, meaningful groups based on predefined rules. This dimension directly provides values like:

  • Organic Search: Users arriving from unpaid search engine results.
  • Referral: Users clicking a link from another website.
  • Direct: Users typing your URL directly or using a bookmark.
  • Paid Search: Users arriving from paid search ads.

These categories align perfectly with the examples ("organic search," "referral") given in the question, making it the ideal dimension for a broad overview of traffic sources.

Analysis of Incorrect Options

  • Session source / medium: This dimension is more granular than what the question asks for. It shows the specific origin (source) and the general category (medium), such as google / organic or bing / cpc. While it contains the necessary information, Session primary channel group directly provides the high-level groupings mentioned.

  • Page title and screen class: This is a behavioral dimension that tells you what content users viewed on your site, not where they came from.

  • Google Ads campaign: This dimension is too specific. It only reports on traffic originating from your Google Ads campaigns and would not include data for sources like "organic search" or "referral."