Why did St nick put his finger by his nose and give a nod?

The phrase "St. Nick put his finger by his nose and gave a nod" comes from the poem "A Visit from St. Nicholas" by Clement Clarke Moore. It describes Santa Claus preparing to ascend his sleigh after delivering presents. The gesture signifies a playful acknowledgment of his magical presence and the joy of the holiday season as he prepares to leave quietly and swiftly.