Advertising spending in the US exceeds $212 billion annually, with worldwide spending over $414 billion. Advertising is used by businesses, nonprofits, professionals, and social agencies to promote ideas, goods, and services through paid, nonpersonal presentations. Developing an advertising campaign involves setting objectives, budgets, messages, media selection, timing, and evaluation. Sales promotion uses short-term incentives to encourage purchases and offers reasons to buy now. Tools include coupons, premiums, and contests. Public relations involves building goodwill through favorable publicity, corporate image, and handling rumors to communicate with key audiences.