PPC Agency: How to Choose, Brief, and Manage One (Without Getting Burned)

A PPC agency manages paid advertising campaigns on platforms like Google, Meta, and TikTok on your behalf, handling everything from strategy and keyword selection to bid management and reporting. The right agency can compress your path to revenue significantly. The wrong one can quietly burn through budget for months while producing reports that look busy but say nothing useful.

This guide covers what a PPC agency actually does, how to evaluate one honestly, what a good engagement looks like in practice, and where most client-agency relationships quietly go wrong.

If you want broader context on how paid advertising fits into a full acquisition strategy, the Paid Advertising Master Hub covers the landscape in full, from channel selection through to measurement.

What Does a PPC Agency Actually Do?

Pay-per-click advertising means you pay each time someone clicks your ad. PPC as a model spans search engines, social platforms, display networks, and shopping feeds. A PPC agency manages that complexity on your behalf.

In practical terms, a PPC agency will typically handle: campaign strategy and structure, keyword research and audience targeting, ad copy creation and testing, bid management, landing page recommendations, conversion tracking setup, and performance reporting. Some agencies also handle creative production, attribution modelling, and feed management for ecommerce clients.

What they should not do is operate as a black box. One of the consistent frustrations I saw from the client side, and later from inside agencies, is that PPC teams often become protective of their campaign structures in ways that do not serve the client. Good agencies make their thinking visible. If you cannot understand why a campaign is structured the way it is, that is a problem worth raising.

The scope of PPC management services varies considerably between agencies. Some operate as pure execution partners. Others position themselves as strategic advisors who happen to run campaigns. The distinction matters when you are deciding how much internal resource to commit alongside the agency.

How Much Does a PPC Agency Cost?

Agency pricing models typically fall into three structures: a percentage of ad spend (commonly between 10% and 20%), a flat monthly retainer, or a performance-based model tied to revenue or leads. Each has trade-offs.

Percentage of spend models create an obvious misalignment. The agency earns more when you spend more, which does not always correlate with you earning more. I have seen this play out in practice. Budgets creep upward, the agency reports improving CPCs, and nobody asks whether the incremental spend is actually profitable. Understanding Google advertising fees and how platform costs interact with agency fees is important context before you agree to any pricing structure.

Flat retainers are cleaner from an alignment perspective, but they can create a different problem: the agency has little incentive to push harder once the retainer is covered. Performance-based models sound attractive but are genuinely difficult to structure fairly, because too many variables outside the agency’s control affect the outcome.

My honest view: a flat retainer with clearly defined deliverables and a quarterly performance review is the most commercially sensible arrangement for most businesses. It keeps the agency accountable without creating perverse incentives around spend.

What Channels Does a PPC Agency Manage?

Most PPC agencies lead with Google Search, which remains the dominant paid search channel and the place where commercial intent is highest. Google Ads (formerly Google AdWords) is the platform most agencies know best, and for good reason: it is where the volume is, and where the measurement is most mature.

Beyond Google Search, agencies typically manage Google Display, Google Shopping, YouTube, Meta (Facebook and Instagram), LinkedIn, and increasingly TikTok. The channel mix depends on your category, your audience, and whether you are primarily capturing existing demand or trying to generate new demand.

That distinction matters more than most agencies acknowledge. Search is largely a demand-capture channel. Someone is already looking for what you sell, and you are competing to be visible at that moment. Social and display are demand-generation channels, where you are interrupting someone who was not looking for you. The creative requirements, measurement approaches, and patience required are fundamentally different.

TikTok Ads have become a serious channel for consumer brands, particularly in fashion, beauty, and entertainment categories. The platform’s algorithm rewards creative quality and native-feeling content in ways that Google’s auction does not. If your agency is recommending TikTok, ask them specifically what creative approach they intend to take, because repurposing Google Display banners onto TikTok is a waste of everyone’s time.

Early in my career at lastminute.com, we ran a paid search campaign for a music festival that generated six figures in revenue within roughly 24 hours. The campaign itself was not complicated. It was tightly structured, the landing page was clean, and the offer was strong. That experience shaped how I think about PPC ever since: the fundamentals done well outperform clever tactics almost every time.

How Do You Evaluate a PPC Agency Before Hiring One?

Case studies are a starting point, not a conclusion. Any agency with a reasonable track record can produce a case study showing impressive ROAS or CPA improvements. The more useful questions are about context: what was the baseline, what changed, and what was happening in the market at the same time?

When I was evaluating agency partners during my time running iProspect, I developed a simple filter. I would ask the agency to critique their own most successful case study. Agencies that could identify what went wrong, or what they would do differently, were almost always better partners than agencies that treated their case studies as infallible proof of competence.

Specific questions worth asking in a pitch process:

• How do you approach campaign structure for an account like ours, and why?
• What metrics do you report on, and which ones do you consider most important?
• How do you handle a campaign that is underperforming against targets?
• What does your onboarding process look like, and how long before we should expect meaningful data?
• Who will actually be working on our account day to day?

That last question is more important than it sounds. The person presenting in the pitch is rarely the person managing your campaigns. Ask to meet the account manager who will own your business, and pay attention to whether they can speak to strategy or only to execution.

You should also look at how they handle the question of innovation. In my experience, agencies use the word innovation to differentiate themselves in pitches without ever connecting it to a real business problem. VR-driven ad formats, AI-generated creative variants, predictive bidding algorithms: none of these things matter if they are not solving a specific problem you actually have. Ask any agency proposing something novel: what problem does this solve, and how will we know if it worked?

What Should a Good Agency Brief Include?

The quality of the brief you write determines the quality of the work you receive. This is one of the most consistent patterns I have observed across twenty years of client-agency relationships, and it is almost never discussed honestly because agencies do not want to tell clients their briefs are inadequate.

A strong PPC brief covers: your business objectives (not your marketing objectives, your actual commercial targets), your target audience with enough specificity to be useful, your competitive context, your budget and how it is allocated, your conversion definition, and any constraints the agency needs to know about (brand guidelines, regulatory restrictions, seasonal pressures).

The conversion definition is where most briefs fall apart. “Generate leads” is not a conversion definition. “Generate qualified leads for our enterprise software product, where a qualified lead is defined as a company with more than 200 employees that has completed the contact form and not unsubscribed within 48 hours” is a conversion definition. The specificity changes everything about how the campaign is structured and measured.

For niche categories, the brief also needs to address search volume honestly. A Google Ads campaign for a beauty salon operates in a very different competitive and volume environment than a national ecommerce brand. The agency needs to know whether they are working with abundant search volume or a narrow keyword set, because the optimisation approach differs significantly.

What Does Good PPC Reporting Look Like?

Most PPC reporting is theatre. Dashboards full of impressions, clicks, CTR, and Quality Score create the impression of rigour without connecting to anything a CFO or a business owner actually cares about.

Good reporting starts from the business outcome and works backward. If your goal is revenue, the report should show revenue attributed to paid channels, cost of acquisition against your target, and trend data that explains whether performance is improving or deteriorating and why. Understanding which PPC metrics matter in your specific context is the foundation of any honest reporting conversation.

There is a legitimate debate about attribution, and a good agency should be having it with you. Last-click attribution, which remains the default in many platforms, systematically overvalues the final touchpoint and undervalues the channels that built awareness or intent earlier in the experience. How search behaviour is influenced by prior exposure is more complex than a single-click model captures.

I judged the Effie Awards for several years, which gave me an unusual perspective on how agencies present effectiveness. The entries that impressed me most were not the ones with the biggest numbers. They were the ones where the agency could explain the mechanism: why the campaign worked, what specifically drove the result, and what they would do differently next time. That same standard applies to monthly PPC reporting. If your agency cannot explain the mechanism, the numbers are decoration.

One specific thing to watch: traffic quality has a direct impact on conversion rates. An agency that reports strong CTR but weak conversion rates is often driving the wrong traffic, and the reporting needs to surface that connection explicitly rather than treating click metrics and conversion metrics as separate conversations.

How Does a PPC Agency Handle Landing Pages?

This is where many PPC engagements quietly fail. The agency optimises the campaign to drive qualified clicks, the clicks arrive at a landing page that does not convert, and both parties look at each other with polite confusion.

A PPC agency’s responsibility to the landing page varies by contract. Some agencies include landing page design and optimisation in their scope. Others will provide recommendations but expect the client to implement them. Clarify this upfront, because a well-run campaign sending traffic to a weak page is a waste of media budget.

The principles of a high-performing PPC landing page are not complicated: message match between the ad and the page, a clear and singular call to action, minimal friction in the conversion path, and enough trust signals to make the visitor comfortable acting. What makes this hard in practice is that landing page decisions often involve teams (design, product, compliance) who are not part of the PPC conversation, and getting alignment takes longer than anyone expects.

My recommendation: treat landing page quality as a joint accountability between the agency and the client from day one. Include landing page conversion rate as a metric in your reporting, and agree on a process for testing and iterating. Agencies that only optimise the campaign side and ignore the landing page side are leaving significant performance on the table.

What Is the Difference Between a PPC Agency and a Paid Search Agency?

The terms are often used interchangeably, but there is a meaningful distinction worth understanding. A paid search agency specialises specifically in search-based advertising: Google Search, Microsoft Ads (Bing), and sometimes Google Shopping. A PPC agency typically covers a broader channel mix including social, display, and video.

For businesses where search intent is the primary driver of conversions, a specialist paid search agency can offer deeper expertise in search-specific disciplines: keyword strategy, Quality Score optimisation, search term analysis, and bidding mechanics. The trade-off is that you may need a separate partner for social or display if those channels become relevant.

For most growing businesses, a PPC agency with genuine multi-channel capability is the more practical choice, provided they have real depth in search rather than treating it as one channel among many with equal weighting. Ask specifically about the split of their client base across channels, and how many of their team are search-certified versus social-certified.

The conversion dynamics between paid search and organic search are also worth understanding when you are deciding how to allocate budget. Paid search delivers immediate visibility and measurable return. SEO builds long-term equity. Most businesses need both, and the best agencies can advise on how the two interact rather than treating them as competing priorities.

When Should You Consider Bringing PPC In-House?

This is a question more businesses should ask, and most agencies are understandably reluctant to answer honestly. The case for in-house PPC is strongest when: you have sufficient scale to justify a dedicated specialist, your category requires deep product knowledge that is difficult to transfer to an external team, and you have the management bandwidth to run an internal function properly.

The case for keeping it with an agency is strongest when: you do not have consistent enough volume to keep a specialist fully occupied, you benefit from the agency’s cross-client pattern recognition, or you are in a period of rapid change where you need flexible capacity.

A hybrid model, where an internal performance marketing manager owns strategy and relationships while an agency handles execution, is often the most effective arrangement for mid-market businesses. It keeps accountability in-house while accessing agency tooling and expertise without paying for a full in-house team.

One thing I would caution against: bringing PPC in-house primarily to save money. The saving is often smaller than it appears once you account for salary, training, tooling, and the learning curve on a new account. Make the decision based on capability and control, not cost reduction.

How to Make the Most of a PPC Agency Relationship

The best client-agency relationships I have been part of, on both sides of the table, share a few consistent characteristics. The client is commercially engaged, not just administratively involved. The agency is transparent about what is working and what is not, without waiting to be asked. Both parties treat the relationship as a genuine partnership rather than a vendor transaction.

Practically, this means: hold a regular performance review (monthly at minimum, weekly during launch phases), share business context the agency needs to do their job well (upcoming promotions, product changes, competitive movements), and create a culture where the agency feels safe raising problems early rather than managing them quietly until they become unavoidable.

One of the most common failure modes I have seen is the client who treats the agency as a supplier to be managed rather than a partner to be worked with. The agency responds by becoming defensive and reporting-focused rather than strategically engaged. The work becomes increasingly mediocre, and both sides wonder what went wrong. The answer is usually that the relationship was never built on honest communication in the first place.

Standing out in a competitive paid search environment requires creative thinking and genuine collaboration between client and agency. If the relationship is purely transactional, you will get transactional work. The clients who get the most from their agencies are the ones who invest in the relationship as much as the brief.

There is a broader point here about how paid advertising fits into your overall marketing architecture. If you are building or refining your approach to paid channels, the Paid Advertising Master Hub brings together strategy, channel selection, and measurement in one place, and is worth reading alongside any agency evaluation process.

About the Author

Keith Lacy is a marketing strategist and former agency CEO with 20+ years of experience across agency leadership, performance marketing, and commercial strategy. He writes The Marketing Juice to cut through the noise and share what actually works.

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