Meta published a technical account of its 2026 GEM ads model, claiming an 18.9% conversion improvement and a 12% CTR lift across ad surfaces. The system unifies predictions for Facebook, Instagram and Reels in one central foundation model. The figures come from Meta itself without independent audit or a full methodology. For advertisers, the changes mostly arrive through automated delivery rather than new Ads Manager controls.
What it means: Meta’s performance claims matter for Greek businesses spending on Meta ads, because they change how the system learns from clicks and conversions across apps. Without independent measurement, the numbers should be treated as directional, not as guaranteed ROI. Advertisers should compare them with their own incrementality tests and watch cost per real sale. Cross-surface learning means behaviour on one placement can shape optimisation on another, complicating placement reports. Teams using Advantage+ should keep holdout tests and avoid raising budgets only because the dashboard shows higher conversions attributed by Meta. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs. It belongs in operational planning for Greek SMEs.
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