Which metric is primarily used to determine the effectiveness of a marketing campaign in Google Analytics?

The effectiveness of a marketing campaign in Google Analytics is best determined by conversions. This metric captures the specific actions that you want users to take, such as completing a purchase, signing up for a newsletter, or submitting a contact form. By analyzing conversion data, marketers can assess whether their campaigns are driving desired outcomes and achieving their goals.

Conversions provide insights into how effectively a campaign turns visitors into customers or leads, offering a clear picture of return on investment (ROI). In contrast, metrics like page views and sessions reflect general traffic activity, while bounce rate indicates the percentage of visitors who leave the site after viewing only one page. While these metrics may provide useful information about user engagement, they do not directly measure the success of achieving specific business objectives like conversions do.