What is necessary to maintain when conducting a mail merge?

Maintaining consistency in the data source during a mail merge is essential because the mail merge process relies heavily on accurate and uniform data to produce personalized documents, such as letters, labels, or email communications. A consistent data source ensures that all entries, such as names, addresses, and other fields, are correctly formatted and free of discrepancies. This uniformity allows for a smooth merge, reducing the risk of errors that could arise from variations in data formatting or inconsistent information. If the data source contains inconsistent data, it can lead to mismatched information in the final documents, resulting in a negative impression on recipients and potentially impacting communication effectiveness.