It's the best ad I've seen this year | Nudge Newsletter 🧠


"We'd be Β£11m richer."

Take a look at this ad.

It's jam-packed with behavioural science principles designed to persuade Londoners to use the product.

Let's break it down.

"10 minutes free daily."

We're drawn to free things. The difference between a chocolate that costs 1 cent and 0 cents is dramatic. The free version increases purchase intention by 69% (*Ariely, 2008).

"Β£11 million richer by now"

Rory Sutherland said, "The meaning and significance attached to something is in direct proportion to the expense with which it is communicated."

Sharing that Forest has sacrificed Β£11 million to deliver their offer will make potential buyers value the offer moreβ€”that's costly signalling.

"51,889,782 free minutes"

Ads with specific numbers are deemed 10% more accurate and believable (Schindler and Yalch 2006).

"Forest's goal is to make zero emission travel affordable."

Luxury fashion brands who agree to donate to charity on your behalf if you buy generate more sales (Strahilevitz, 1998). It's due to the Noble Edge Effect.

When companies demonstrate genuine social responsibility, consumers reward them with increased respect, which in turn leads to greater profits.

"Here's 100 free mins"

The bike beneath the ad isn't available for use. When users try to scan the code, they'll see this.

We love variable rewards like this.

Shen (2015) found that participants were 62% more likely to complete a task if the rewards they received were variable and unpredictable.

Surprises like this from Forest will make potential customers more likely to sign up.


It's a cracking ad, and it's given me an idea.

In a few weeks, I'll watch 300 TV ads from the past twenty years, review each one, and determine how many use behavioural science principles like this.

That'll be a future episode of Nudge, out on December 2nd.

To make sure you don't miss it, subscribe to Nudge wherever you get your pods.

Cheers,

Phill

*Yep, I'm aware that Ariely's a risky researcher to cite these days. Watch this to learn why. But this experiment hasn't been questioned, and the findings are backed by dozens of other studies.

Nudge Newsletter

I spend 18 hours each week turning marketing psychology into readable newsletters.

Read more from Nudge Newsletter

Concrete Phrases Read online Could writing "𝐀𝐂𝐓𝐔𝐀𝐋 π’πˆπ™π„" on a Whopper ad make it sell for π’Žπ’π’“π’†? In 2022, 465 participants saw ads for a fictional Lay's multipack.ΒΉ Both groups knew the multipack was 392g in size, but each saw a different headline. One saw: π˜“π˜’π˜Ί'𝘴 𝘊𝘩π˜ͺ𝘱𝘴, 14 𝘴𝘯𝘒𝘀𝘬 𝘣𝘒𝘨𝘴The other saw:π˜“π˜’π˜Ί'𝘴 𝘊𝘩π˜ͺ𝘱𝘴, 392𝘨. Those who saw "14 snack bags" were willing to pay 10% 𝐦𝐨𝐫𝐞 than the other group.This is due to the concrete phrases effect. We can picture 14 snack bags in our mind. 392g doesn't...

Variable Rewards Read online This video of a smart gas station owner went viral a couple of months back. Here's the original. The video shows dozens of customers failing to balance 25 cents on a lemon. A chance to win $100 is a carrot large enough to make customers bet. It shows something that many marketers have known for decades. We love a gamble. People prefer a gamble In 2025, researchers Gaertig and Simmons offered either a gamble or a certain reward to hundreds of participantsΒΉ. Some...

Adobe Summit London 2026 Read online Last week, I had great fun attending the Adobe Summit London 2026. Partly great hearing about the latest innovations in AI and partly great catching up with the friendliest man in marketing, Joe Glover. Two stats from the opening keynote that stuck with me. 1: Organic web search traffic is down 20% 2: Conversion rate for AI search is 42% higher then before It’s a reminder that so many of the norms of marketing have fundamentally changed. I remember my old...