# Banner optimisation ### 1. Business value: Turn constraints into opportunities Consent management is no longer just a legal obligation (GDPR, ePrivacy), it is a strategic lever for your digital performance. * **Data quality**: An optimised banner reduces consent decline, ensuring reliable data for conversion measurement and targeting. * **Trust and brand image**: A transparent and reassuring experience promotes data protection as a competitive advantage. * **Reduced friction**: Ergonomic design facilitates decision-making and improves the overall user experience. ### 2. Implementation methodology #### Step A: Design and Ergonomics (Mobile Focus) With over 60% of visits coming from smartphones, mobile display is critical. * **Compact format**: Opt for a footer that takes up 20-25% of the screen height so as not to block navigation. * **Touch areas**: Ensure that buttons are at least 44px in size to avoid clicking errors. * **Accessibility**: Maintain a contrast ratio of 4.5:1 (RGAA/WCAG standards) for text and buttons. #### Step B: Fairness and visual hierarchy To be compliant (particularly with CNIL recommendations), choices must be fair. * **Equal visibility**: The ‘Accept all’, ‘Reject all’ and “Customise” buttons must have the same level of visibility. * **Ban ‘dark patterns’:** Do not make the ‘Accept’ button brightly coloured while making the ‘Reject’ button dull or discreet. * **Explicit wording**: Use clear actions such as ‘Accept all’ instead of ambiguous terms such as “OK” or ‘Continue’. #### Step C: Message and Transparency Text content is crucial for user engagement. * **Simplicity:** Avoid legal jargon (e.g., ‘third-party cookies,’ ‘legitimate purposes’) in favour of educational phrases. * **Reversibility:** Clearly state that the user can change their choices at any time. * **Positive tone**: Highlight benefits such as personalisation of the experience rather than using anxiety-inducing language. #### **Step D: Optimising the consent rate** Use Platform X's technical levers to refine your performance. * **A/B Testing**: Test one variable at a time (wording, colour or location) to identify the best-performing variant. * **Reactivation**: Configure follow-up scenarios for users who have not made a choice (‘no-choice’) after a certain period of time. * **Google Consent Mode**: Enable this mode to continue measuring conversions via Google Ads/Analytics even if cookies are refused. ### 3. Measurement and Monitoring (KPIs) Regularly analyse your performance via Commanders Act dashboards. * **Opt-in/refusal/no-choice rate**: Track changes after each design or wording modification. * **Segmentation by device**: Identify whether friction is higher on mobile than on desktop. * **Realtime Cookie Scanner:** Use this tool to monitor in real time that cookies are not placed before consent is given, ensuring ongoing compliance. ### 4. Additional resources To further develop your strategy and discover concrete examples of compliant design and wording, we invite you to consult our comprehensive guide. {% file src="" %} ### Need help optimising your CMP? Our experts will help you optimise your banners and configure accessibility settings to maximise your performance. **Contact our support team**: