Narrated Qatadah: From Anas: "The Prophet ﷺ prohibited that a man should drink while standing". (Qatadah said:) So it was said: "And eating ?" He (Anas) said: "That is worse". Abu 'Eisa said: This Hadith is Hasan Sahih.
This hadith also serves as a reminder for us to be mindful of how we conduct ourselves in public settings, especially when around other people who may be observing our behavior. We should strive to maintain good manners at all times so that others can benefit from our example and learn from it too!