Omnicom Group is a holding company that owns a large portfolio of advertising, marketing and public relations agencies, providing creative advertising campaigns, media buying services and marketing strategy to corporate clients across virtually every industry. Its agency network operates under many different brand names rather than a single unified agency, letting Omnicom serve competing clients in the same industry without direct conflicts of interest between different agencies under its corporate umbrella. The advertising industry has faced significant disruption from the shift toward digital and social media advertising, requiring traditional agency holding companies like Omnicom to build out digital marketing and data analytics capabilities alongside their traditional creative advertising services. Omnicom's revenue is tied to overall corporate advertising and marketing spending, which tends to be sensitive to broader economic conditions since marketing budgets are often among the first expenses companies cut during economic uncertainty.