Which marketing method involves using customized newsletters to engage with customers?

The marketing method that involves using customized newsletters to engage with customers is email marketing. This approach focuses on sending tailored content directly to a recipient's email, allowing businesses to connect with their audience effectively. These newsletters can include personalized offers, updates, and relevant information that cater to the interests of the recipients, thereby fostering a stronger relationship between the business and its customers.

Email marketing is particularly effective because it allows for segmentation of the audience, meaning businesses can target specific groups with relevant content. This customization helps increase engagement rates, encourages repeat business, and can improve customer retention. Additionally, the direct nature of emails ensures that the information reaches the audience in a more personal manner compared to other marketing methods.

In contrast, social media marketing primarily involves engaging with customers through various social platforms and does not specifically focus on personalized email communication. Content marketing centers on creating valuable content such as articles and videos to attract and engage customers but is not limited to newsletters. Search engine marketing focuses on promoting websites by increasing their visibility in search engine results, which does not involve direct communication through newsletters either. Thus, email marketing distinctly stands out as the method that uses customized newsletters for customer engagement.