In 2025, the digital advertising landscape in the Adriatic region is undergoing one of its most dynamic transformation phases. Consumers are spending more time online, shifting seamlessly between search, video, and shopping; auction competition is intensifying; the role of artificial intelligence is accelerating; and the accuracy of signals is becoming a defining competitive advantage.
Despite their geographic proximity, Slovenia, Croatia, and Serbia demonstrate fundamentally different advertising patterns — from seasonal peaks to CPC dynamics and the pace of automation adoption. This is why understanding local data has never been more crucial.
Against this backdrop, Sempl 2025 became a key platform where Admixer Media presented the results of an in-depth analytical study of the three markets and shared real cases of AI-driven optimisation in Google Ads.
During two sessions — within the IAB Academy and the main conference programme — Karmen Krumpestar (Admixer Media) and Artur Mosiak (Google) explained how data, automation, and first-party signals are reshaping digital marketing in 2025. Both sessions centred around one core message: Everything starts with data. The quality of signals determines the quality of optimisation, while a precise understanding of local market dynamics defines campaign performance.
Markets of Slovenia, Croatia, and Serbia: Data Reveals Fundamental Differences
During the IAB Academy session, Karmen Krumpestar demonstrated that advertising campaigns across the three Adria markets cannot be planned using a one-size-fits-all approach — user behaviour, seasonal demand, and CPC trajectories differ too significantly.
Croatia shows distinct investment spikes during the summer and again around Black Friday. Slovenia invests heavily throughout Q4 but sharply reduces budgets immediately after Black Friday, even though demand continues to grow. Serbia, meanwhile, is steadily increasing investments month over month and peak spending occurs in the final two months of the year.
The level of agency involvement also varies considerably. In Slovenia, more than half of Google Ads accounts are managed in-house, while in Croatia and Serbia the majority of Ads accounts (over 75 % in Croatia and over 65% in Serbia) are run by agencies. This leads to drastically different speeds of automation adoption and optimisation practices.
These differences become even more pronounced in peak seasons. Search activity, video consumption, and shopping demand increase across all three countries — but at very different paces. After Black Friday, CPC rises in Croatia, contrary to general trends, while in Slovenia it drops sharply, creating an opportunity window for brands that continue investing throughout December.
European Google research reinforces these behavioural patterns: shoppers who use Google Search and YouTube during the holiday period are 1.6× more likely to complete a purchase and make twice as many transactions overall. This highlights the importance of maintaining visibility in moments of intense commercial activity.
When Data Meets AI: Solutions That Drive Performance
The second session, led by Karmen Krumpestar and Artur Mosiak, focused on the growing role of AI within Google Ads. The platform increasingly relies on high-quality first-party data, enabling algorithms to form precise intent signals and build robust predictive models.
Today, the effectiveness of performance marketing relies on three components:
- high-quality first-party data,
- AI-powered bidding capable of analysing hundreds of signals in real time,
- and the integration of online and offline interactions into a single measurement ecosystem.
These principles formed the foundation of one of the standout examples shared at Sempl — the Pirnar case.
Pirnar, a premium manufacturer of entrance doors, had long been generating online leads, but all sales were completed offline. For Google Ads, these offline conversions remained invisible — limiting the effectiveness of Smart Bidding.
Admixer Media proposed implementing Enhanced Conversions for Web and Enhanced Conversions for Leads, enabling the recovery of lost signals and ensuring data was hashed and processed according to privacy standards.
Immediately after the implementation, results improved significantly:
- +20.9% conversions
- –2.8% total spend
- –19.5% cost per lead
- –38.7% CPC, resulting in a substantial increase in traffic
Moreover, analysis showed that 5% of all Google Ads conversions corresponded to actual offline purchases — data that no measurement system had previously captured. This allowed the advertiser to finally see the full impact of Google Ads on total sales.
The case demonstrated how the integration of accurate first-party signals significantly boosts the performance of the Power Pair (Search + Performance Max) and unlocks a more precise view of true ROI.
As Pirnar’s team notes:
“We work and consult with Admixer Media on a regular basis. Their support strengthens our capabilities, improves our performance, and ensures that our advertising activities follow industry best practices.”
This testimonial underscores how ongoing strategic collaboration directly contributes to sustainable performance growth.
Why Adria’s Local Markets Require a New Planning Logic
Success in 2025 depends on a brand’s ability to operate on real data rather than assumptions. Despite being part of the same regional cluster, Slovenia, Croatia, and Serbia demonstrate different behavioural patterns, seasonality cycles, agency structures, and buying dynamics. Only adaptive, flexible strategies can turn these differences into a competitive advantage.
At the same time, AI-driven tools in Google Ads are becoming central to campaign scaling. Implementing Enhanced Conversions and integrating CRM data are no longer optional — they are essential components of effective optimisation.
As the market evolves, the importance of data and technology will continue to grow. In 2026, competitiveness in digital advertising will be defined not by the size of a brand’s budget, but by the maturity of its data and technology infrastructure. In an environment driven by automation and signal quality, this maturity becomes a critical success factor.
This is where Admixer Media plays a meaningful role in the region. As the Official Google Ads Sales Representative, the company provides advertisers and agencies with direct access to Google’s technology ecosystem, strengthened by local expertise, strategic advisory, and hands-on technical support. This combination enables teams to adopt AI capabilities faster, test new solutions in real conditions, and scale their campaigns with greater confidence and precision.
As Karmen Krumpestar, Country Program Lead at Admixer Media, explains:
“The Google Ads Sales Representative (ASR) programme is built on partnership. We do not replace agencies — we strengthen them. Agencies retain full ownership of strategy, account management, and creative decisions, while Admixer Media provides the technical and strategic expertise needed to unlock the full potential of Google Ads.”
This collaborative model gives agencies deeper market insights, early visibility into product innovations, and expert support across account structuring, bidding strategies, AI-powered optimisation, cross-channel measurement, and real-time performance management. Continuous training, consultations, and dedicated educational sessions further elevate team capabilities.
In practice, Admixer Media becomes an acceleration partner — enhancing agency performance, supporting complex implementations, and raising the overall operational maturity of Google Ads campaigns, all without interfering in client relationships.Looking to improve the efficiency and measurement accuracy of your Google Ads campaigns in Slovenia?
Contact Admixer Media to explore partnership opportunities.
