Does it have specific tactical advantages or is it just cool?
Edit to add: what about specific types of formations, like a Flying V vs a Diamond vs whatever else they can do?
In: 797
Nobody mentioned yet, and I am suprised seeing as there are real fighter pilots here:
In adition to tactical advantages, there is a very important physics one: optimising air resistance.
You probably saw geese or other birds fly in formations before. They are not random. They are designed by nature to optimise energy consumption. The same goes for planes.
Video link from Boeing here:
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