Conclusions Paper: Thematic Panel 3: 'From Insight to Impact: Building and Evaluating Online Prevention Strategies Against Radicalisation”

The fourth meeting of Thematic Panel 3 (TP3) of the EU Knowledge Hub on the Prevention of Radicalisation (EUKH), held in Budapest on 15-16 December 2025 brought together panel members and invited experts to examine how online prevention efforts are being designed, implemented, and assessed across Europe. The meeting was conceived with two complementary aims: first, to take stock of existing online prevention interventions by showcasing initiatives led by governmental institutions, civil society organisations, international bodies, and the tech sector; and second, to deepen the collective understanding of impact by shifting the focus from what we do to how we know it works.

Structured in two interconnected sections, the meeting first centred on Mapping What Works, offering targeted presentations from diverse stakeholder groups and surfacing persistent gaps in current practice. Through case spotlights and a roundtable exchange, participants shared insights into successes, challenges, and context-specific lessons. A central feature of this section was the collaborative Gap Tracker, a shared board where participants mapped strategic needs, design weaknesses, and evaluation priorities across the presented initiatives, creating a visual, collective diagnosis of where progress is strong and where further development is required. The second section focused on strengthening evaluation literacy and design capacity through two hands-on training workshops led by Martin Bæksgaard Jakobsen, EUKH Special Advisor on Evaluation. Using Theory of Change (ToC) as a foundational tool, the training workshop helped practitioners translate the strategic intervention models they apply in their daily online P/CVE work into practical monitoring and evaluation approaches.