The idea is a simple as you just need to claim a part of the beach. By giving away printed towels, flipflops with footprints, parasols, …), you create such a visibility and positive vibe. I did it once doing it low-budget wen we were launching Simyo, a online and low-cost telecom alternative. The goal is to put your brand in a positive context (who’s not happy when at the beach?) and use pictures and video taken to further promote a summer campaign for a particular brand that want a sunny outlook.