What is a common metric used to measure the success of an email campaign in Marketo?

Click-through rate is a fundamental metric used to gauge the success of an email campaign in Marketo. It measures the percentage of recipients who clicked on one or more links within the email, providing insight into how effectively the content engages the audience. A higher click-through rate typically indicates that the email's subject line, content, and call-to-action are compelling enough to encourage recipients to take the desired action.

This metric is particularly important because it not only reflects the effectiveness of the email's design and messaging but also impacts future marketing strategies. Marketers can analyze the click-through rate alongside other metrics to refine their approach in crafting emails that resonate more with their audience.

The other options, while relevant in different contexts, do not specifically measure email campaign success. Website bounce rate pertains more to the performance of a website rather than emails, cost per click is primarily a metric related to paid advertising rather than email marketing, and social media shares reflect engagement on social platforms instead of the direct performance of email communications. Therefore, click-through rate stands out as a key indicator for evaluating the performance of email campaigns in Marketo.