A thank you note is a short, written message expressing gratitude to someone for a gift, favor, or kind gesture. These notes can be handwritten or digital and are often sent after special occasions like birthdays, weddings, or holidays. They help strengthen relationships by showing appreciation and acknowledging the thoughtfulness of the giver. Writing a thank you note typically includes a greeting, a specific mention of what you are thankful for, and a closing statement. Personalizing the note with a memory or a shared experience can make it even more meaningful. Overall, sending a thank you note is a simple yet powerful way to convey gratitude.