Cannes Lions: What Award-Winning Work Tells You

The Cannes Lions Creative Festival is the most prestigious awards programme in advertising. Each year, the industry’s best agencies and brands compete for Lions across categories spanning film, outdoor, digital, social, and effectiveness. Winning is genuinely hard. But what winning tells you about marketing that works commercially is a more complicated question than the festival’s positioning suggests.

Having judged major awards including the Effies, and spent two decades watching agencies build award strategies alongside (and sometimes instead of) client strategies, I have a reasonably clear view of what the Cannes Lions ceremony reveals, what it obscures, and how commercially minded marketers should actually use it.

If you are thinking about how creative strategy connects to go-to-market execution and commercial growth, the broader context is worth reading. The Go-To-Market and Growth Strategy hub covers the frameworks that sit behind decisions like where to invest in brand, how to sequence creative and performance, and what growth actually requires at different stages of a business.

What the Cannes Lions Awards Actually Measure

The Cannes Lions International Festival of Creativity has run since 1954. It began as an advertising film festival modelled on the Cannes Film Festival, and the DNA of that origin is still visible. The festival rewards creative ambition, craft, and cultural resonance. It does not, primarily, reward commercial return.

There is a separate track, the Creative Effectiveness Lions, which attempts to bridge that gap. Entries must demonstrate business impact over a sustained period, not just campaign metrics. That category is harder to win, less glamorous, and less frequently discussed. The Grand Prix for Creativity gets the headlines. The Effectiveness Lions get a polite mention.

That asymmetry tells you something important about what the festival values and what it does not. Creativity that is measurably commercial is harder to package into a three-minute case study film. It requires longitudinal data, honest attribution, and a willingness to show the messy middle between launch and result. Most award entries are not built for that kind of transparency.

I have seen this dynamic from the judging side. At the Effies, where commercial effectiveness is the explicit criterion, some entrants work hard to present correlation as causation. Sales went up. The campaign ran. Therefore the campaign caused the sales increase. Judges who are not analytically rigorous accept this framing. Judges who push back on attribution methodology are sometimes outnumbered. The problem is not unique to Cannes, but it is worth naming clearly.

Why Case Study Films Are Not Evidence

The Cannes Lions entry process requires a written case study and, for most categories, a case study film. These are produced by the entering agency, usually with significant resource behind them. They are, by design, persuasive documents. They are not audited. They are not independently verified. They are a curated version of events.

I am not suggesting widespread fabrication. Most entries represent real work that ran in the real world. But there is a significant difference between a campaign that ran and a campaign that worked in the way the case study implies. The selection of which metrics to feature, which timeframes to use, and which contextual factors to omit is entirely at the discretion of the entrant.

Early in my career, before I understood this fully, I treated award-winning case studies as proof of concept. If a campaign won a Lion, it must have been effective. Over time I realised that what those case studies often proved was that someone was very good at writing case studies. That is a real skill. It is not the same as commercial effectiveness.

This matters for how you use Cannes as a reference point. Taking creative inspiration from award-winning work is reasonable. Treating the business results cited in an entry as validated evidence is not. The Forrester intelligent growth model makes a similar point about distinguishing between activity metrics and outcome metrics in growth strategy, and the same discipline applies here.

The Causation Problem Nobody Talks About Enough

The most persistent analytical failure in awards judging is the conflation of correlation with causation. A brand runs a campaign. Sales increase during or after the campaign period. The entry attributes the sales increase to the campaign. Judges who are not trained in attribution methodology often accept this without challenge.

What is rarely asked: what else changed during that period? Did the brand increase distribution? Did a competitor have a supply issue? Did the category grow because of external factors? Was there a pricing change? Did the sales increase start before the campaign launched?

When I judged the Effies, I pushed on these questions consistently. Sometimes the entrant had done the work and could demonstrate genuine incrementality. More often, the honest answer was that they could not separate the campaign’s contribution from other variables. The campaign probably helped. By how much was genuinely unknown. That uncertainty was rarely reflected in the entry itself.

This is not a reason to dismiss awards entirely. It is a reason to read them critically. The same discipline you would apply to any marketing measurement claim should apply to award case studies. Market penetration data and sales uplifts can have multiple causes. The campaign is one of them. Treating it as the only one is intellectually dishonest, even when it is done with good intentions.

What Cannes Lions Is Actually Good For

Having spent several paragraphs on what Cannes does not tell you, it is worth being equally direct about what it does.

The festival is a genuine aggregator of creative ambition. Across thousands of entries from dozens of markets, patterns emerge about what kinds of creative thinking are cutting through, what formats are gaining traction, and what cultural tensions brands are finding productive to engage with. That pattern recognition has real value for strategists and planners.

When I was running an agency and growing the team from around 20 people to over 100, we used Cannes as a calibration tool. Not as a blueprint, but as a signal. If a particular approach to storytelling was showing up repeatedly across winning entries in different categories and different markets, that was worth paying attention to. Not because the awards proved it worked commercially, but because it suggested the approach was resonating with sophisticated creative audiences, which often, though not always, preceded broader cultural resonance.

The festival is also useful for competitive intelligence. Understanding which agencies are producing consistently recognised work, which holding groups are investing in creative talent, and which markets are generating genuinely original thinking gives you a view of where the industry’s creative centre of gravity is moving.

And for clients who care about agency reputation, Cannes performance is a proxy signal, imperfect but not meaningless. An agency that consistently produces Lions-recognised work has demonstrated something about its creative culture, even if that culture does not automatically translate into commercial results for every client.

The Tension Between Creative Awards and Commercial Strategy

There is a structural tension in how agencies relate to awards that clients should understand clearly.

Award-winning work benefits the agency more directly than it benefits the client. A Lion elevates the agency’s reputation, helps with recruitment, and supports new business pitches. The client’s brand appears in the case study, but the creative credit accrues primarily to the agency. This creates an incentive structure that does not always align with the client’s commercial priorities.

I have seen this play out in both directions. I have seen agencies push for creative ambition that genuinely served the client’s brand and delivered commercial results. I have also seen agencies pursue creative executions that served the agency’s awards strategy more than the client’s growth objectives. The difference is not always obvious in the brief stage. It often becomes clear in the results.

The first week I joined Cybercom, the founder was pulled into a client meeting mid-brainstorm for a Guinness brief and handed me the whiteboard pen in front of the entire room. My internal reaction was something close to panic. But what I noticed in that moment, and in many similar moments since, is that the best creative thinking always started from the commercial problem, not from the desired creative output. The agencies that consistently produced both award-winning and commercially effective work were the ones where those two things were treated as connected, not competing.

BCG’s work on brand strategy and go-to-market alignment makes a related point: the brands that sustain commercial advantage are the ones where creative strategy and commercial strategy are built together, not bolted together after the fact.

How to Use Cannes Lions as a Strategist

If you are a senior marketer or strategist, here is a more useful framework for engaging with Cannes Lions than simply admiring the winners.

First, look at the Creative Effectiveness Lions specifically. These are the entries that have attempted to demonstrate sustained commercial impact over time. They are harder to win precisely because the bar for evidence is higher. The winners in this category are a more reliable signal of campaigns that actually moved business metrics.

Second, look for patterns across categories rather than individual winners. A single Grand Prix tells you about one campaign in one context. Patterns across 20 or 30 shortlisted entries in different categories tell you something about broader creative and cultural trends that may be worth factoring into your own strategy.

Third, read the case studies with the same critical eye you would apply to any marketing claim. Ask what the counterfactual was. Ask what other variables were present. Ask whether the metrics cited are outputs or outcomes. Ask whether the timeframe selected was chosen because it showed the most favourable results.

Fourth, use the festival as a creative stimulus for your own team, not as a template. The worst thing you can do with award-winning work is try to replicate it. The creative approach that won a Lion for one brand in one market at one moment in time will not automatically transfer to your context. What transfers is the quality of thinking, not the execution.

Fifth, if your agency is entering work on your behalf, ask directly how the entry was constructed. Which metrics were selected and why. What was omitted. Whether the results cited were independently verified. A good agency will welcome that conversation. An agency that is uncomfortable with it is telling you something useful.

The Broader Question: What Does “Effective” Mean in Creative Work?

The debate around Cannes Lions and commercial effectiveness reflects a deeper question that the industry has not resolved: what does it mean for creative work to be effective?

There are at least three different answers in common use, and they are not always compatible.

The first is cultural effectiveness: did the work enter the cultural conversation, generate earned media, and shift how people talked about the brand? This is what Cannes primarily rewards, and it is a legitimate measure of something. Cultural resonance does correlate with brand health over time, even if the causal mechanism is difficult to isolate.

The second is behavioural effectiveness: did the work change what people did? Did it drive trial, purchase, loyalty, or advocacy? This is harder to measure and harder to attribute to a single campaign, but it is closer to what most clients are actually paying for.

The third is commercial effectiveness: did the work generate a return on the investment? Did the revenue or margin impact exceed the cost of production and media? This is the hardest to measure cleanly, and the least frequently discussed in creative awards contexts, even in categories that claim to reward it.

Managing significant ad spend across multiple industries over the years has made me consistently sceptical of claims that conflate these three things. Cultural effectiveness does not automatically produce behavioural change. Behavioural change does not automatically produce commercial return. The chain of causation matters, and it is rarely as clean as a case study film suggests.

Understanding how creative investment fits into a broader commercial growth model is something the Go-To-Market and Growth Strategy hub explores in more depth, particularly around how to sequence brand and performance investment at different stages of market development.

What the Industry Could Do Better

The Cannes Lions organisation has made genuine efforts to address the effectiveness gap over the years. The Creative Effectiveness Lions category, the partnership with the IPA Effectiveness Databank, and the increasing emphasis on purpose-driven work with measurable social impact all reflect an awareness that creative excellence alone is insufficient as a measure of value.

But there are structural changes that would make the festival more useful to commercially minded marketers.

Independent verification of business results cited in entries would raise the bar significantly. If entrants knew that the sales figures and market share data in their case studies would be checked against audited financials or third-party data sources, the quality of evidence would improve. This would make the festival less accessible for smaller entrants, which is a real cost. But it would make the results more meaningful.

Mandatory disclosure of what was excluded from a case study would also help. Every entry tells a story. The story is shaped by what is left out as much as what is included. A requirement to disclose significant contextual factors, including competitive activity, distribution changes, and pricing moves, during the campaign period would give judges better information.

And a clearer separation between craft awards and effectiveness awards, with genuinely different judging panels and criteria, would help marketers understand what they are actually looking at when they review the winners list.

None of this diminishes the genuine creativity that Cannes surfaces. The festival has produced some of the most memorable and culturally significant advertising of the last 70 years. That is worth celebrating. It is also worth being clear-eyed about what it does and does not prove.

The BCG commercial transformation framework is useful context here: the brands that sustain growth are the ones that treat creative investment as one input into a broader commercial system, not as an end in itself. Awards are a signal within that system. They are not the system.

Growth strategy that relies on creative reputation without commercial accountability is a category error. The examples of sustained growth that hold up over time are almost always the ones where creative ambition and commercial discipline were running in parallel, not competing for priority.

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 works.

Frequently Asked Questions