Introduction
U.S. internet advertising revenue hit $294.6 billion in 2025, up 13.9% year over year, according to IAB and PwC's Internet Advertising Revenue Report. Nearly every one of those dollars passed through some form of media buying before it reached a screen, a billboard, or a radio spot.
Yet many marketers still use "media buying" and "media planning" interchangeably. That confusion causes real problems: misaligned budgets, wasted spend, and campaigns that hit deadlines but miss performance targets.
This guide breaks down what media buying actually is, how it works step by step, where it happens across channels, and how to choose a partner who executes it well.
Key Takeaways
- Media buying is the execution phase of advertising, purchasing and managing ad placements
- It happens through direct deals, programmatic auctions, self-serve platforms, or retail media networks
- The process follows four stages: handoff, purchasing, monitoring, and reporting
- Planning sets the strategy; buying puts it into market
- Strong media buying stretches budgets further and ties spend directly to results
What Is Media Buying?
Media buying is the process of purchasing advertising space and time, across traditional and digital channels, to execute a predetermined media plan. It's the "doing" part of advertising: negotiating rates, securing inventory, and managing delivery once the strategy has already been set.
This work requires specialized skills. Someone has to know how to negotiate a rate with a local TV station and how to configure a bid strategy inside a demand-side platform. That's why media buying exists as its own discipline, separate from the strategic work of planning.
Media buying is not media planning. Planning defines the where and why: audience, budget, channel mix. Buying handles the how and when: negotiation, purchasing, and pacing. We'll unpack that distinction further below.
Why Media Buying Still Needs Human Oversight
Automated bidding and AI-driven platforms handle a growing share of the transaction. But brand safety checks, contract negotiation, and understanding the context behind a placement still require a person in the loop. Platforms can execute; they can't always judge whether an ad belongs next to a given piece of content.
The Four Main Types of Media Buying
That oversight looks different depending on the buying method, since the process itself changes considerably from one type to the next:
- Direct: Negotiated deals with individual publishers or stations, common for print, broadcast, and premium digital inventory
- Programmatic: Automated buying through demand-side platforms (DSPs), using real-time bidding auctions
- Self-serve: In-platform buying through tools like Google Ads or Meta Ads Manager
- Retail media: Buying placements on commerce platforms such as Amazon or Walmart Connect
Digital and programmatic channels now dominate transaction volume. eMarketer forecast digital capturing 77.7% of 2024 U.S. total media ad spending, and programmatic display alone was projected to exceed 92% of U.S. digital display spending by 2025. Direct-negotiated deals still matter, particularly for local broadcast, trade publications, and premium sponsorships, but the bulk of dollars now move through automated channels.
How Does Media Buying Work?
Regardless of channel, media buying moves through a defined sequence: receiving the plan, purchasing inventory, monitoring performance, and reporting results.
Campaign Handoff and Setup
The process begins once media planning wraps and the goals, audience, and budget get handed to the buying team. That handoff can look different depending on the channel:
- Manual initiation: Direct negotiation with a publisher or station rep
- Platform-based initiation: Uploading targeting parameters and budget into a DSP or self-serve tool
- Hybrid initiation: Combining negotiated commitments with self-serve execution for cross-channel campaigns
A common bottleneck shows up here: misaligned tracking setup between planners and buyers. If pixels, UTM parameters, and conversion events aren't standardized before launch, optimization later in the campaign becomes guesswork.
Growth Marketing Werks treats tracking infrastructure as a prerequisite. The team builds attribution chains from media source down to sale before a single dollar goes live, so nothing needs reverse-engineering mid-campaign.
Purchasing and Execution
This is the core action: securing inventory. In direct deals, that means finalizing an insertion order. In programmatic, it means winning real-time bidding auctions.
Here's what actually happens during a programmatic execution, in milliseconds:
- An exchange sends a bid request describing an available impression
- The bidder evaluates the opportunity and submits a price
- Google's systems, for example, give bidders 80 to 1,000 milliseconds to respond, depending on format and auction type
- The highest bid wins, and the associated creative gets served instantly
Bid strategy, audience precision, and budget pacing all affect cost efficiency at this stage. A poorly paced budget can burn through spend in the first week and leave nothing for the rest of the month, a mistake that shows up fast in delivery reports.
Monitoring and Optimization
Once a campaign goes live, buyers don't walk away. The first 24-48 hours typically involve quality checks to confirm delivery is tracking correctly and targeting is firing as intended.
From there, optimization becomes an ongoing discipline. Key levers include:
- Reallocating budget toward top-performing placements
- Pausing underperforming tactics or partners
- Adjusting bids based on auction performance
- Managing frequency to prevent audience fatigue
Active monitoring matters because waste is common at scale. The ANA's Q2 2025 Programmatic Transparency Benchmark estimated that $26.8 billion in global media value is lost annually to inefficiencies in the digital supply chain. Without someone actively watching delivery, fraud, viewability issues, and made-for-advertising sites drain budgets meant for real audiences.
Reporting and Results
The final output is a performance report comparing actual delivery against the original plan and its KPIs. This report feeds directly into the next planning cycle and into cross-channel attribution models.
Platform-reported metrics alone can mislead. In-platform return on ad spend (ROAS) often looks strong while masking real inefficiency, because each channel reports its own conversions using its own attribution window. That's part of why Growth Marketing Werks runs campaigns through Datorama, a data aggregation and visualization tool, to unify performance across every channel into one source of truth rather than a patchwork of platform dashboards.
Media Buying vs. Media Planning
Media planning is the strategic phase. It defines the audience, sets the budget, chooses the channel mix, and establishes the KPIs, all before a dollar gets spent.
Media buying is the execution phase. It negotiates rates, purchases placements, and optimizes delivery based on the plan already in place.
| Aspect | Media Planning | Media Buying |
|---|---|---|
| Focus | Strategy | Execution |
| Key questions | Where and why | How and when |
| Output | Audience, budget, channel mix, KPIs | Purchased inventory, live campaigns, performance data |
| Timing | Before spend | During and after spend |
The two functions are distinct, but treating them as separate silos causes problems. When planners hand off a strategy and disappear, buyers lose the context needed to make smart in-flight decisions. The strongest results come from integrating both functions into one continuous strategy, where the same team owns the thinking and the execution. At Growth Marketing Werks, one team handles both the planning and the buying, so nothing gets lost in the handoff.
Where Media Buying Happens: Channels and Who Executes It
Media buyers work across two broad categories:
- Traditional: TV, radio, out-of-home, print
- Digital: Search, social, display, connected TV, retail media
Execution typically falls to one of three groups: in-house media teams, specialized agencies, or automated programmatic platforms. In-housing has grown steadily, and the ANA reports:
- 82% of member companies now operate an in-house agency
- 54% of those in-house teams handle at least some media planning or buying work directly
Beyond who executes the buy, channel reliance shifts dramatically by industry. Retail media, for instance, has become a budget priority fast: 57% of surveyed marketers now allocate 10% to 39% of their marketing budget to retail media networks. 62% expect to increase that spend over the next two years.
An enterprise technology company's channel mix looks nothing like a senior care brand's: one leans on LinkedIn and ABM programs, the other on CTV, geo-fencing, and community-targeted print.
Choosing the Right Media Buying Partner
Here's an industry pitfall worth naming directly: agencies compensated as a percentage of media investment have a built-in incentive to spend more, not necessarily to spend smarter. Research from WFA and MediaSense found that 65% of surveyed advertisers still use commission-based fees, compared with just 22% using fixed fees, and commission structures can reward inflated budgets over business outcomes.
Growth Marketing Werks was built around a different model. The agency operates on flat-fee, advisory-based pricing instead of a percentage of spend. That structure lets its media buyers act as financial advisors for advertising dollars, building strategy around client goals rather than filling a media plan on autopilot. As founder Suzanne Corriell has put it: "With flat-fee pricing and full-funnel expertise, our only incentive is your growth."
When evaluating a media buying partner, look for:
- Platform certifications: proof the team knows the tools they're buying through (The Trade Desk, Meta, Google Campaign Manager)
- Structured project management: defined stages, owners, and deadlines for every campaign
- Transparent reporting: clear delivery of what was purchased and what it produced
- Unified data tools: platforms like Datorama that consolidate performance across the full funnel, rather than reporting each channel in isolation
Vetting partners against these criteria turns media buying from a line-item expense into a growth lever, sharpening channel decisions and strengthening long-term ROI.
Frequently Asked Questions
How do you buy media?
Media buying starts with a finalized media plan. From there, the buyer secures inventory through direct negotiation or programmatic platforms, then launches, monitors, and optimizes the campaign against agreed KPIs.
What does buying media mean?
It means purchasing advertising space or time across channels to place ads in front of a target audience, putting the strategy defined during media planning into actual market execution.
What is an example of media buying?
A senior living provider launches a multi-channel campaign combining programmatic display, paid search, and social ads, timed to reach adult children researching care options within a defined quarterly budget.
What's the difference between media buying and media planning?
Planning sets the strategy: audience, budget, and KPIs. Buying handles the execution, negotiating rates, purchasing inventory, and optimizing performance once the campaign is live.
Who typically handles media buying for a company?
It can sit with in-house media teams, outsourced agencies, or automated programmatic platforms, depending on company size, budget, and internal expertise.
Is media buying only useful for large budgets or big brands?
No. Media buying applies at any budget size. Smaller organizations often benefit most from strategic buying, since every dollar has to work harder to hit measurable targets.
