There are two types of eating. They are manners and cleanliness.
Some manners would be eating with our mouth closed and don’t speak when food is in your mouth.
Another manner would be saying thank you when you are given the food. This is under manners because it may help the people who made the food make more.
The second type is cleanliness. To be clean when eating you could eat slowly, eat over the tray and walk slowly when putting rubbish in the rubbish bin. The reason to walk slowly to the bin is because there might still be some stuff in your lunchbox or what you were eating with.