Business8 min read
The 5-second test: how to tell if people understand what you sell
Three questions to check your profile, your page or your WhatsApp in 5 seconds, with Costa Rican data and examples.
A customer decides very quickly whether to keep reading. If they can’t tell what you sell in the first few seconds, they don’t ask: they move on. And in Costa Rica that first contact is almost never a website. It’s your WhatsApp profile, your Facebook page, a post someone shared, or what you answer when someone asks what you do.
This article gives you a three-question test to check that first impression on any channel, with examples and the data that explains why it matters.
What the data says about first impressions
It’s judged in a fraction of a second. In 2006, a team at Carleton University showed people web pages for just 50 milliseconds, roughly one frame of video. People rated how visually appealing each page was, and those ratings matched the ones they gave after looking at the pages calmly (Lindgaard et al., Behaviour & Information Technology, 2006). A caution on this one: it measures whether something looks good, not whether it’s understood. Understanding takes a little longer, but not much.
The first 10 seconds decide. A Microsoft Research analysis of 205,873 web pages found that the first 10 seconds are the critical ones for whether someone stays or leaves; people who get past about 30 seconds tend to stay. Jakob Nielsen of Nielsen Norman Group’s conclusion: “to gain several minutes of user attention, you must clearly communicate your value proposition within 10 seconds” (Nielsen Norman Group, 2011). The study is about web pages, but the logic applies to any screen where someone discovers you.
In Costa Rica, the first impression happens on a phone
The country’s numbers explain why the test can’t be only for websites:
| Figure | Value | Source |
|---|---|---|
| Adults with a mobile phone who use WhatsApp | 96% | Cicom-UCR, Nuestras apps de cada día 2025 (in Spanish) |
| Use Facebook | 80% | Cicom-UCR 2025 |
| Use YouTube | 77% | Cicom-UCR 2025 |
| Use TikTok | 58% (36% in 2023) | Cicom-UCR 2025 |
| Use Instagram | 47% | Cicom-UCR 2025 |
| Use X | 15% | Cicom-UCR 2025 |
| Use LinkedIn | 11% | Cicom-UCR 2025 |
| Internet users | 4.78 million (92.6% of the population) | DataReportal, Digital 2026: Costa Rica |
The Cicom-UCR study is a national phone survey of 792 adults with a mobile phone, carried out from August 25 to 29, 2025, with a margin of error of ±3.5 points (University of Costa Rica, 2026, in Spanish). DataReportal’s figures reflect the data available as of October 2025.
On the business side, a Costa Rican Chamber of Commerce survey of 153 formal businesses found that 86% use messaging apps, mostly WhatsApp, and 85% use social media to sell; only 36% had their own e-commerce platform (La Nación, 2021, in Spanish). And on the buyer’s side, 65.3% of online purchases were made from a phone, according to CIOdD-UCR’s first E-commerce Survey (Rumbo Económico, 2022, in Spanish).
Word of mouth still rules. A Unimer study presented at Data Media Day Costa Rica 2026 reports that 41% trust a direct recommendation from another person most, and that 65% say influencers have little or no influence on what they buy (La Nación, July 2026, in Spanish). That’s why your answer when someone asks “so what do you do?” is a first impression too: it’s what that person will repeat.
An honest note: these figures come from different studies, with different methods and years. They don’t add up and shouldn’t be compared with each other. What they do show together is the picture: people get to know you through WhatsApp, social media and recommendations, and almost always on a phone.
How to run the test
The 5-second test is a well-known user research method: someone looks at a design for five seconds and then answers what they remember and what they understood. It tells you whether people understand what’s on offer and who it’s for, and 5 to 10 people are usually enough to surface the main problems (Lyssna, five-second testing guide).
For your business:
- Take a screenshot of the first thing a new customer sees: your bio, your cover, your WhatsApp Business profile or your home page.
- Show it for 5 seconds to someone who doesn’t know your business. If nobody’s around, do it yourself: read it for 5 seconds and cover it.
- Without looking again, answer the three questions below.
- Repeat it with at least five people. If two or more hesitate on the same question, that’s what needs fixing.
1. What do you sell?
The first line has to say what you sell, in a customer’s words.
- Fails: “Comprehensive solutions for your life.” Sounds nice and says nothing.
- Works: “Surf clothing made in Jacó. Shipping nationwide.” It says what it is, where it comes from and how it gets to you.
How to fix it: write what you sell the way you’d say it to someone on the street. A concrete noun (clothes, cakes, repairs, classes) is worth more than any adjective. If you sell several things, name the main one first; the rest can go in pinned posts or the catalog.
2. Who is it for?
The reader has to think: this is for me.
- Fails: “We have everything for everyone.” It speaks to no one.
- Works: “Cakes for kids’ parties in San José.” It speaks to whoever is planning a birthday.
How to fix it: name your customer or their situation. It doesn’t close doors: it helps the right customer recognize you faster, and that’s the one who buys. If you serve several kinds of customer, pick the most important one for the first line.
3. What happens next?
This is the question almost everyone forgets. When someone finishes reading or messages you, do they know what to do?
- Fails: “Hi, thanks for writing.” The conversation goes nowhere.
- Works: “Hi. What day would you like to book?” It moves the customer one step.
How to fix it: one clear step, always visible. In WhatsApp Business, the automatic greeting message is the ideal place for that question. On Instagram, the contact button and the first line of the bio. On your website, a main button you can see without scrolling. Five equal options aren’t a step: they’re a decision you’re leaving to the customer.
Where to run the test, channel by channel
| Channel | What to check first |
|---|---|
| WhatsApp Business | The name, the profile description, the catalog and the greeting message |
| The cover photo, the page name and the About section | |
| The bio, the contact button and the pinned posts | |
| Google Business Profile | The name, the category, the photos and the updates |
| Website | Everything visible without scrolling |
| Word of mouth | What you answer when someone asks what you do |
One detail about Google Business Profile: the updates you post are archived after six months unless you set another duration (Google Help). If your latest update is a year old, that’s a first impression too.
What if you passed all three?
Then you’re understood. The next step is getting found more: showing up when someone searches for what you sell, on Google, on social media or through recommendations. Save the test and repeat it whenever you change your profile, your catalog or your message.
To do this week
- Take screenshots of your three main channels.
- Show them for 5 seconds to five people who don’t know you.
- Write down which question they hesitated on.
- Rewrite just that line and test again.
If you’d like a second opinion
Message us on WhatsApp with the link or a screenshot of what you want reviewed and we’ll tell you which of the three questions it fails. At Vector we build websites, online stores and profiles people understand at first glance. We’re a small team in Costa Rica, since 2018.
Sources
Consulted October 20, 2026.
- Lindgaard, G., Fernandes, G., Dudek, C. and Brown, J. (2006). “Attention web designers: You have 50 milliseconds to make a good first impression!” Behaviour & Information Technology, 25(2), 115-126. Summary in Nature News.
- Nielsen, J. (2011). How Long Do Users Stay on Web Pages? Nielsen Norman Group. Based on Liu, White and Dumais, “Understanding web browsing behaviors through Weibull analysis of dwell time”, SIGIR 2010.
- Centro de Investigación en Comunicación, University of Costa Rica (2026). Nuestras apps de cada día 2025. UCR news release and figures by platform in El Observador (both in Spanish).
- Kemp, S. (2025). Digital 2026: Costa Rica. DataReportal.
- Cámara de Comercio de Costa Rica (2021). Realidad del comercio electrónico en Costa Rica. La Nación (in Spanish).
- CIOdD-UCR (2022). Primera Encuesta de Comercio Electrónico en Costa Rica. Rumbo Económico (in Spanish).
- Unimer (2026), presented at Data Media Day Costa Rica 2026. La Nación (in Spanish).
- Lyssna. Five second testing guide.
- Google. Posts on your Business Profile.