Explanation:

To test which subject line results in the most email opens for the first email sent in an abandoned cart journey, the marketing associate should utilize the A/B Test feature in Journey Builder. This feature allows for the creation of different versions of an email with varying subject lines, which can then be tested on a segment of the journey's audience. The version that performs the best in terms of open rate can be determined through this test, and that subject line can then be used for the remainder of the journey's audience to optimize engagement.

To gather information on many email sends and create a data extension for this purpose, the marketing associate should use the Send Logging template. Send Logging in Salesforce Marketing Cloud is a feature that captures send-time information for each email sent, including subscriber data, send data, and email content. This information is stored in a Send Logging data extension, providing a detailed record of email sends that can be used for analysis, reporting, and further segmentation.

Explanation: For the marketing associate at Cloud Kicks importing a list of contacts into a data extension with attributes like ContactID, MobileNumber, and EmailAddress, the best choice for the primary key would be ContactID. The primary key in a data extension is used to ensure uniqueness of each record, preventing duplicate entries. Given that ContactID is described as the unique identifier for each contact, it naturally serves as the most appropriate choice for the primary key.
Using ContactID as the primary key guarantees that each contact will be represented only once in the data extension, regardless of whether they might have multiple email addresses or mobile numbers over time. This approach aligns with best practices in database management and data integrity.

References: Salesforce Marketing Cloud documentation emphasizes the importance of selecting an appropriate primary key for data extensions to maintain data quality and ensure the uniqueness of records.

Journey History in Salesforce Marketing Cloud’s Journey Builder provides a record of each contact’s journey, including details about which steps they have completed and where any issues might have occurred. By reviewing Journey History, the marketing associate can investigate whether the emails were sent, and if not, identify any errors or skips.

Benefits of Journey History: It allows for a granular look at each customer’s interaction with the journey and can help troubleshoot any issues related to delivery or content processing within the journey.

Salesforce Documentation Reference: For more information, see Journey Builder History Overview.

Explanation: Under GDPR principles, one of the key obligations for companies is to ensure that the personal data they hold is accurate and up to date. Therefore, contacting the client to verify or update their personal data is not only allowed but encouraged under GDPR. This aligns with the GDPR's accuracy principle, which states that personal data should be accurate and, where necessary, kept up to date. It is the responsibility of the data controller to take every reasonable step to ensure that personal data that is inaccurate is either erased or rectified without delay.