Southwest Airlines outlines their digital marketing strategy which includes hiring a social media specialist, using platforms like Facebook, Twitter, and Instagram to engage customers and provide discounts and travel tips. Their $20.5 million budget is allocated across initiatives like Google Adwords, free flights and incentives, and the social media specialist salary. A key part of their strategy is targeting college students through a "Southwest March Madness" campaign during the NCAA basketball tournament by offering students from selected schools discounted flights.