Short answer: The best performance marketing agency for your business is the one that can show you Many growth stories with numbers, counts the profit and not only ROAS, it has seen real scale in advertising spend and he knows how the platforms work today, which makes targeting AI and creative. Below you will find the 7 criteria and what to ask to see for each one.
1. Ask to see development stories, not a screenshot
Every agency has a good ROAS in a week. What matters is what happens over the long term and with how many customers.
What to ask for: Growth stories with a graph per year, not one.
At Dizzy, in a number of cases, eshops it has worked with have passed 1 million € per year. Two examples:
- e-shop that came to us with 2,000 € in turnover per month and today, within 5 years, it exceeds 10 million € per year·
- E-shop that came to us the day it opened and within the first 3 years it surpassed 4 million € per year.
See more at case studies.
2. Ask what matters: ROAS or profit?;
A 5 ROAS with a 20% margin can leave you at zero, while a 3 ROAS with a 60% margin can leave you a profit. An agency that only sends you ROAS from Ads Manager doesn’t tell you whether you’re growing or just turning over more money.
What to ask for: if it counts contribution margin (what remains after the product cost, shipping and advertising) and Overall return in all channels combined, that is, the total revenue from total advertising.
That's why at Dizzy every account is judged first on contribution margin and then on ROAS.
3. Has it run accounts on a real scale?;
Managing €3,000 a month is one thing; scaling up without losing the profit is another. On a large scale, creative work burns out in a matter of days; the audience gets exhausted, and every mistake costs thousands.
What to ask for: the largest accounts that are running today, in monthly expense.
For comparison, Dizzy manages over €1,000,000 per month in ad spend, and, as an example, a single client on its own spends more than 100.000 € per month. If you want to see what it takes to get there, read on. How to reach €50–100,000 per month with advertising with a profit.
4. Does he know how the platforms work in 2026?;
The way ads work has changed radically in a year. An agency that still breaks the audience down into dozens of ad sets with interesting content is working in the old way.
- Meta: with the new systems Andromeda and GEM, the AI decides who sees what based on the creative itself. Today’s «targeting» is 8–12 truly different videos and images, not interest lists.
- Google: from September 2026, many Search campaigns (those with automatically created assets or broad match) are moving to AI Max and they appear in searches beyond the keywords. Without proper exclusions and a good feed, the account pays for irrelevant searches.
- TikTok Shop: Shop ads now run mandatorily on GMV Max, which optimizes based on the Shop's sales. See Why open a TikTok Shop now.
What to ask for: to explain to you in simple words what has changed this year and what it does differently.
5. On which channels does it run, and where does it say «no»?;
Dizzy runs ads on Google, Meta (Facebook, Instagram, Threads, WhatsApp), TikTok and TikTok Shop, LinkedIn, Pinterest, Reddit, Spotify, ChatGPT Ads and Programmatic. It is an official Google Partner, Meta Business Partner, TikTok Marketing Partner, TikTok Shop Partner and Klaviyo Partner. And it says “no” to a channel that doesn't fit the business.
6. Does it stop in the ads or does it grow overall?;
Ads bring the first customer. Profit comes when they repurchase, when the average order increases, and when the site doesn’t lose customers at checkout.
Dizzy works as a Growth Partner, with advertisements, Klaviyo, Viber, UGC creators, technical support and eshop development. In eshops it works with, average order value has risen, for example from 37 € to over 50 €. You'll find all the stages in the guide. How to increase sales in the eshop.
7. Who else confirms it?;
Dizzy's work has been recognised by the industry's leading awards. In 2026 it won 1 Silver and 3 Bronze at the Peak Awards and 4 Bronze Awards at the e-volution Awards, in its first year of entering. Its founder has been recognised in 20 under 40 by Boussias, in the Performance Marketing category (2023).
Small or large agency?;
Large networks have scale, but your account often ends up with a junior. Small agencies give you attention, but haven't seen scale. Dizzy is boutique size, with large agency numbers: it works closely with a small number of businesses and manages more than €1,000,000 a month in ad spend.
The list for the meeting
- ✅ growth stories (not one) with a graph per year
- ✅ how profit is calculated (contribution margin, overall return)
- ✅ the largest accounts in monthly spend
- ✅ what changed in 2026 (Andromeda, AI Max, GMV Max) and what it does differently
- ✅ where it says «no»
- ✅ what it does beyond ads
- ✅ Awards or reviews from third parties
FAQs
Which is the best performance marketing agency in Greece?;
There is no official ranking. Look for the agency that has many growth stories with numbers, measures profit and runs accounts at real scale. At Dizzy, in a number of cases eshops have passed €1m a year: for example, one grew from €2,000 a month to €10m+ a year in 5 years. Dizzy manages more than €1,000,000 a month in ad spend.
Is there a performance agency in Athens with TikTok Shop?;
Yes. Dizzy, based in Athens, is an official TikTok Shop Partner and is already running TikTok Shops for Greek e-shops.
What changed in ads in 2026?;
Targeting is now done mainly by the platforms' AI, based on the creative (Meta Andromeda). Many Google Search campaigns are moving automatically to AI Max. TikTok Shop ads run on GMV Max.
What is the difference between a performance agency and a digital marketing agency?;
The performance agency is judged by measurable results, such as sales, leads, and profit, and not by impressions or reach. Dizzy measures each campaign based on the contribution margin.
