HSN Code 4909 refers to "Printed or illustrated postcards; printed cards bearing personal greetings, messages or announcements, whether or not illustrated, with or without envelopes or trimmings." This classification code is essential for identifying greeting cards and related printed materials for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 4909 include illustrated postcards, personal greeting cards, announcement cards, and holiday cards, with variations that may include different themes and designs. Additionally, the GST rate for printed cards and postcards under this code supports accurate trade compliance.