What task can Litmus perform in Content Builder for marketers?

Litmus can indeed provide significant value in Content Builder for marketers by allowing them to preview emails in different Email Service Providers (ESPs), browsers, and devices. This capability is crucial because it ensures that marketers can see how their emails will render in various environments before sending them out, which helps identify potential formatting issues, broken links, or any other discrepancies that could negatively impact the recipient's experience.

By using Litmus for this purpose, marketers can create more effective email campaigns, as they are equipped with the knowledge of how their content will appear to the end users across diverse platforms and devices. This capability enhances overall email performance through improved user experience and engagement.

In contrast, the other options relate to functionalities that are typically outside the scope of Litmus within the Salesforce Marketing Cloud. Audience segmentation, sending test sends, and A/B testing serve different purposes and are usually managed through other features and tools available within the Marketing Cloud ecosystem.