Advertising is a paid form of non-personal promotion used to introduce, build awareness of, and persuade people about ideas, goods, and services. Modern advertising aims to impact consumer behavior through strategic communication objectives. It has four key components: the advertiser, agency, media, and suppliers. Advertising serves marketing, communication, economic, and societal roles. Current developments include greater interactivity, integrated marketing communication, and addressing globalization. An effective ad gets attention, creates a positive brand impression, differentiates the brand, and influences the desired consumer response.