The average person needs 1g of protein for every kilo of body mass.
This isn't much.
It translates to a person of average weight, about 150lbs, only needing about 70g of protein.
Good quality protein is vital for many functions in our bodies from keeping our immune system functioning to transmitting signals from cell to cell to rebuilding new cells to the obvious muscle strength.
In the western world, when we think of protein, usual suspects come to mind first: eggs, poultry, fish, tofu and red meats.