Salesforce Marketing Cloud Data Extension Operations 1. ➕ Add and Update (Default Operation) What It Does: Adds new records to your Data Extension. Updates existing records if there’s a match based on a unique identifier, like Email Address 📧 or Subscriber Key. How It Works: If the unique identifier (like Email) exists in the Data Extension, the record is updated with the new information. If the identifier doesn’t exist, a new record is added. Example: Imagine you have a Data Extension for Customer Info: Email Address (Primary Key) First Name Last Name Subscription Status john.doe@email.com John Doe Active jane.smith@email.com Jane Smith Inactive If john.doe@email.com already exists, it will update any fields that have changed (e.g., Subscription Status). If jane.smith@email.com doesn’t exist, it will be added as a new record. When to Use It: When you want to keep records updated while also adding new ones. Best for dynamic data like contact details or customer preferences. 2....