Which of the following is a key consideration when using Einstein Sales Emails?

The key consideration when using Einstein Sales Emails is the requirement of the Einstein Sales Emails permission set. This permission set is critical because it enables users to access the features and functionalities associated with Einstein Sales Emails, which enhances the email engagement experience by providing AI-driven insights.

Without the appropriate permissions granted through this permission set, users would not be able to fully utilize the advantages of Einstein Sales Emails, such as automatic tracking of emails and integration with Salesforce data for better context and follow-ups. As organizations look to implement AI experiences in their sales processes, ensuring that users have the correct permissions is vital for maximizing the tool's potential impact on sales strategy and effectiveness.

The other options refer to functionalities or access points that do not align with the core requirements for using Einstein Sales Emails. For instance, the notion that it supports only Speech-to-Text functionality is limiting and does not cover the broader range of features available. Similarly, implying that it is exclusively available on mobile applications or that it requires Microsoft Outlook restricts its applicability in a flexible sales environment where users might benefit from various platforms and tools. Thus, the permission set stands out as the most relevant consideration when implementing Einstein Sales Emails effectively.