Why are integrated marketing communication plans so important to marketers? What are the benefits and challenges of implementing an IMC?Discuss

Why are integrated marketing communication plans so important to marketers?
What are the benefits and challenges of implementing an IMC?
What are some primary benefits of advertising online?
If “company A” has developed a new beverage product known as Akamu, for satisfying human thirst, what are some of the major advertising decisions this company can create in order to promote Akamu the new product?