Table for three
It is important to maintain proper decorum in every place and situation you are in. Similarly, while at a formal dinner there are rules to be followed.
There are various rules such as never start the meal wait for the host to invite you to the table, always pass salt and pepper together even if someone asks only for one of them, always keep your mouth closed while chewing, never use your fingers to push your food onto your spoon, never add salt and pepper before tasting the food and many other such rules.
Go through these slides to get familiar with some important etiquette. Try these interactive exercises too.