PROMOTION AND COMMUNICATION ACTIONS THROUGH THE SYSTEM OF SARDINIAN AIRPORTS (CAGLIARI, ALGHERO, OLBIA) IN ORDER TO COMPLETE THE PANEL OF COMMUNICATION CHANNELS PRESENT IN THE TERRITORY. IN PARTICULAR: — NETWORK OF INFORMATION POINTS AND RECEPTION — CONVEYING COMMUNICATION CAMPAIGNS AND COORDINATED IMAGE THROUGH THE FACILITIES OF THE AIRPORTS — INSTALLATIONS DEDICATED TO SYMBOLIC ATTRACTORS (GIANTS MONT’E PRAMA) — CORNER CREATION DEDICATED TO THE ENHANCEMENT OF ARTISTIC CRAFTSMANSHIP