Final answer:
The advantage of a written thank-you message is that it is unique, serves as a tangible goodwill reminder, is a thoughtful gesture, and conveys a respectful and positive impression to the recipient.
Step-by-step explanation:
The advantage of a written thank-you message is that it encompasses multiple benefits. Firstly, a written thank-you note is unique and, therefore, often more appreciated by recipients because it reflects a personal touch. Moreover, it serves as a tangible reminder of goodwill thoughts, poses as a thoughtful gesture, and demonstrates an effort taken by the sender to express gratitude. Importantly, a written message allows for careful selection of words and construction of sentences, ensuring clear communication and proper etiquette. Lastly, by following proper message-writing guidelines, you respect your audience and create a positive impression, further enhancing the sentiment of the message.