You want to ensure that the format of your email adjusts based on whether your contacts engage via mobile or desktop. This is describing what term?
Explanation: The correct answer is Personalization. Personalization in email marketing involves tailoring content, design, and functionality to meet the individual preferences and behaviors of each recipient. In the scenario described, adjusting the format of the email based on whether contacts engage via mobile or desktop demonstrates personalization because it customizes the user experience to suit the device preferences of each recipient. By personalizing the email format, marketers can enhance the relevance and usability of the content, optimizing engagement and improving overall campaign performance. This level of personalization goes beyond simply addressing recipients by their first name or segmenting them based on demographic information; instead, it adapts the presentation of the email to align with the specific device habits of each recipient, ultimately leading to a more effective and engaging email marketing strategy.