Spend a few minutes reading about almost any major advertising campaign and you'll probably come across more than one company.

The brand behind the product may thank its creative agency for developing the campaign. A separate media agency planned and purchased the advertising. A production company handled the video shoot. A photographer, illustrator, or director created the campaign assets.

For someone outside the industry, it's not always obvious why so many organizations are involved in a single campaign. If the brand is responsible for marketing its products, why are agencies, production companies, and creative partners involved at all?

The answer starts with understanding the different roles brands and agencies play.

Brands market their own products and services. Advertising agencies provide specialized marketing, creative, media, and communications expertise to brands and other organizations. Most campaigns rely on both, with each contributing something the other doesn't.

Why do brands hire advertising agencies?

Imagine you're leading marketing for a company preparing to launch a new product.

Your team understands the business, the customers, the competitive landscape, and the goals of the campaign. What it may not include is a media buying team, commercial production capabilities, or specialists in every discipline needed to bring a national campaign to market.

Hiring an agency allows the organization to add those capabilities without building every function internally. Depending on the project, that might mean developing the creative concept, planning and buying media, producing campaign assets, supporting public relations, or contributing specialized strategic expertise.

Some organizations build long-term relationships with agency partners and involve them in nearly every major campaign. Others bring agencies in only when a project requires skills or capacity that don't exist internally. The right approach depends on the business, the work being done, and the resources already in place.

Why do some brands work with several agencies?

Many organizations work with several agency partners at the same time, each responsible for a different part of the marketing function.

A national retailer, for example, might rely on one agency to develop its creative campaign, another to plan and buy media, a public relations agency to manage communications, and a production company to create photography and video. A healthcare company may add a specialist agency with experience navigating regulated industries, while a global brand may have different agency partners in different regions.

Those relationships usually reflect the complexity of the business rather than a preference for working with multiple vendors. As organizations expand into new markets, introduce new products, or acquire other companies, they often need expertise that a single agency doesn't provide.

One of the more interesting things you'll notice when researching organizations is that agency rosters often tell part of the company's story. A business launching internationally may add regional agency partners. A company investing heavily in public relations or experiential marketing may bring in new specialists. Looking at who an organization works with can reveal how its marketing priorities have evolved over time.

Why are brands investing in in-house creative teams?

Over the last decade, many brands have expanded their internal creative capabilities.

Some now have designers, writers, photographers, video producers, and creative directors working alongside product marketers, communications teams, and digital marketers. Others have built internal studios capable of producing everything from social content to large-scale product launches.

That shift has changed how many organizations work with agencies, but it hasn't made agencies obsolete.

Instead, responsibilities have become more specialized.

Routine content production, day-to-day creative support, and ongoing brand management often stay in-house because those teams are deeply embedded in the business. Agencies are more likely to be brought in for brand strategy, major campaigns, new product launches, media planning, or projects that benefit from outside expertise.

The balance looks different from one organization to the next, but it's increasingly common to see internal creative teams and agency partners working as extensions of one another rather than as competing functions.

What does this tell us about the advertising industry?

Once you understand the difference between brands and agencies, a lot of other parts of the advertising industry start to make more sense.

Take a job posting for a Creative Director.

Without any context, that title tells you very little. At an agency, the role may involve leading creative work across multiple client accounts, balancing competing priorities, and pitching new business. At a consumer brand, the same title may focus almost entirely on a single company's products, campaigns, and long-term brand strategy.

The same thing happens when researching companies.

An announcement that a brand has hired a new media agency means something different than an announcement that it has hired a new Chief Marketing Officer. One reflects a partnership. The other reflects a change in internal leadership. Both can influence how the organization approaches marketing, but in different ways.

Understanding where an organization sits in the advertising ecosystem gives those kinds of announcements context. Instead of seeing disconnected companies, job titles, and partnerships, you begin to understand how they fit together.

Understanding the Industry Starts With Understanding Its Organizations

Whether you're researching companies, looking for new business opportunities, exploring career moves, or simply trying to understand how advertising works, knowing the difference between brands and agencies gives you a stronger foundation for interpreting what you see.

It explains why organizations build different kinds of marketing teams, why agency partnerships change over time, and why similar job titles can represent very different responsibilities.

Agency Access was built around the idea that understanding the advertising industry requires more than a list of company names or contact information.

Organizations don't exist in isolation. They work together, compete, specialize, merge, grow, and evolve. The more you understand those relationships, the easier it becomes to understand the industry itself.

If you're interested in learning more about how agencies, brands, media companies, publishers, and creative businesses fit together, start with how advertising campaigns come together behind the scenes, or explore the rest of the Resource Hub. Each article is designed to answer a question people working in the industry ask every day—and to make the advertising landscape a little easier to navigate.

Frequently Asked Questions

What's the difference between an advertising agency and a brand?

A brand markets and sells its own products or services. An advertising agency provides marketing, creative, media, communications, or strategic services to clients, which often include brands.

Do all brands hire advertising agencies?

No. Some organizations rely heavily on agency partners, while others have built extensive in-house marketing and creative teams. Many use a combination of both.

Can a brand work with multiple advertising agencies?

Yes. It's common for larger organizations to work with multiple agency partners specializing in areas such as creative, media, public relations, production, healthcare marketing, or experiential marketing.

Why are more brands building in-house creative teams?

Many organizations have expanded their internal creative capabilities to increase speed, maintain brand consistency, and support the growing volume of content required across marketing channels.

What's the difference between an in-house creative team and an advertising agency?

An in-house creative team works exclusively for one organization and is embedded in its day-to-day business. An advertising agency serves multiple clients and brings experience from working across different industries, brands, and marketing challenges. Many organizations use both, with each supporting different types of work.