Coastal areas have moderate climate ,due to the continuous land and sea breeze
They also tend to have ample rainfall ,if the ocean currents are warm (on the coast)
It gives many unskilled and skilled people work.
Example -fishermen and coast guard respectively
Economy is benefitted by the tourism revenues from the beach and other maritime assets say presence of crude oil on the continental shelves along the coast .
Moreover it facilitates transport from one bay to other within or outside the country by cheap water transport