a hand clutches a megaphone, loudly proclaiming "sale!", on a transparent background

communication announcement manipulation presentation proclaiming transparent advertising information background affordable excitement enthusiasm psychology persuasion propaganda conference megaphone promotion marketing wholesale ecommerce impulsive awareness education relations clutches isolated discount commerce business shopping consumer customer campaign branding behavior training speaking bargain finance economy digital message urgency release loudly retail budget online social slogan speech action buying public skills offer price cheap money media noise sound voice press hand sale deal