What is to and from meaning in letter?

"To" and "from" are commonly seen in the header information of letters and mail. "To" indicates the recipient of the letter or package, while "from" indicates the sender. These details are important for ensuring that the item is delivered to the correct person and that any responses or acknowledgments are sent back to the sender. The full mailing address of both the sender and recipient should be included in the "to" and "from" sections to prevent any confusion or misplacement of the item.