Digital advertising and analytics increasingly depend on the delicate balance between user privacy and data‑driven insight. 2024–2025 saw pivotal changes — Google made Consent Mode v2 mandatory for European advertisers, regulators across continents cracked down on deceptive cookie banners and the European Commission proposed sweeping reforms to simplify consent. By March 2026 the result is a patchwork of laws and best‑practice guidelines that businesses must navigate to stay compliant and retain marketing visibility.
Below is an update on Consent Mode v2, the latest legal developments and practical tips for implementing cookie consent in 2026.
Google Consent Mode v2: obligations and pitfalls
Mandatory implementation. Google’s updated consent framework became mandatory for advertisers in the European Economic Area (EEA) in March 2024 and for broader Google Ads conversion/remarketing users. The v2 update introduces two new consent signals — ad_user_data and ad_personalization — to complement the existing analytics_storage and ad_storage parameters. Its purpose is to tell Google precisely which activities (analytics, ad storage, personalised ads) users have allowed or denied.
Default settings matter. To comply with privacy‑by‑default principles, tags must initially set all four parameters to “denied” and only switch to “granted” after explicit user action. Most CMP vendors provide basic and advanced modes. In basic mode, data is not collected when consent is refused; in advanced mode anonymised “pings” are sent to Google to model conversion events — a practice some data‑protection experts caution may still entail personal data processing.
Implementation challenges. Despite high adoption (over 90 % of EEA advertisers), implementation quality varies. A 2025 study found that 67 % of Consent Mode v2 deployments defaulted to “granted” before users had a chance to choose, undermining the consent‑first rule; only 23 % recovered the promised measurement improvements. Typical errors include pre‑ticked categories, mis‑mapped consent strings and inconsistent behaviour across websites or devices.
Practical tips:
- Use a certified Consent Management Platform (CMP). A CMP helps set parameters to “denied” until explicit consent is given and generates audit trails showing how consent was received and applied.
- Map categories correctly. Align cookie categories and Google signals so that analytics, ad storage, user data and personalisation toggles respect user choices.
- Combine with server‑side tagging. Running tags in a server‑side environment after consent verification prevents non‑consented tracking and improves control.
- Update privacy notices. Even with Consent Mode, the legal obligation to obtain valid consent through a clear banner remains.
Regulatory updates: Europe takes the lead
Digital Omnibus proposal
On 19 November 2025, the European Commission unveiled a Digital Omnibus Regulation to simplify consent and reduce banner fatigue. Key proposals include:
- One‑click “accept” and “reject” buttons at the same prominence, eliminating multi‑layered flows;
- A six‑month ban on re‑prompting users after refusal, limiting repetitive consent requests;
- Development of browser‑ or OS‑level privacy switches, allowing people to set global cookie preferences that websites must honour;
- Moving cookie rules into the GDPR and clarifying exceptions for aggregated statistics.
The proposal aims to reduce banner fatigue without weakening consent. Businesses should note that it is still a proposal and current GDPR/ePrivacy obligations remain. Adoption is expected between 2026 and 2027.
Enforcement against dark patterns
France (CNIL). The French data‑protection authority fined Google €325 million in September 2025 after finding that Gmail displayed ads between emails and set advertising cookies during account creation without valid consent. The CNIL emphasised that consent must be freely given and that making ad cookies a condition for account access undermines validity.
In December 2024, CNIL issued formal notices to multiple publishers for misleading cookie banners that used dark patterns. Violations included hiding reject options within text, unequal button sizing and embedding rejection links deep within menus. Publishers were given one month to redesign their banners.
Sweden (IMY). Sweden’s privacy authority criticised three companies for cookie banners that used visually dominant “Accept” buttons and made rejection require multi‑step navigation. IMY stated that accept and reject choices must have equal visual prominence and require equal effort. It also condemned ambiguous labels like “I understand” and pre‑selected consent boxes as manipulative.
California (CalPrivacy). California’s updated CCPA regulations, effective Jan 1 2026, list a crackdown on dark patterns as an enforcement priority. Regulators expect opt‑out flows — including cookie‑based opt‑outs — to function smoothly and avoid choice designs that frustrate consumer intent. Businesses must also recognise Global Privacy Control (GPC) signals and respect universal opt‑out mechanisms.
New legislation around the world
- India’s Digital Personal Data Protection (DPDP) Act. Phase 1 of India’s DPDP Act, activated in late 2025, requires cookie consent in 22+ official languages and allows users to withdraw consent with a single click. Consent managers must be Indian‑incorporated entities with significant net worth, and full compliance is expected by May 2027.
- Brazil’s LGPD enforcement. Brazil’s data‑protection authority intensified audits focusing on cookie banners. Violations include pre‑ticked boxes, grouped consent without purpose‑specific options and failure to honour withdrawal; Portuguese language interfaces are mandatory.
- U.S. state privacy laws. By January 2026, comprehensive privacy laws in Indiana, Kentucky and Rhode Island joined California, Colorado, Virginia and other states. The IAPP notes that effective dates of these laws and California’s expanded CCPA regulations will increase enforcement, with multi‑state coordination despite differing frameworks. Coverage thresholds typically apply to entities processing data on 100,000 or more consumers and give residents opt‑outs for targeted advertising and data sales.
Industry developments: cookies, tracking and beyond
Google’s reversal on third‑party cookies
After years of promising to eliminate third‑party cookies, Google announced in July 2024 that Chrome would not phase out third‑party cookies but instead offer users a choice. The decision shifted focus to first‑party data strategies and privacy‑preserving technologies. Businesses should continue preparing for reduced cookie reliance while leveraging first‑party data, server‑side tagging and Privacy Sandbox APIs.
U.S. RTB settlement introduces opt‑in controls
On 26 March 2026, a U.S. federal judge approved a class‑action settlement requiring Google to add an RTB Control that lets users limit personal data shared in real‑time bidding auctions. When activated, the control removes user IDs, device advertising IDs, IP addresses and cookie‑matching data from ad‑auction requests, effectively turning targeted impressions into contextual ones. Google must deploy the control at account and browser levels and notify all U.S. account holders within 30 days.
Design & UX trends for ethical consent
- Equal prominence and single‑click options: Regulators increasingly demand that accept and reject buttons be identically sized, coloured and positioned. Multi‑step rejection is deemed a dark pattern.
- Clear language: Avoid vague labels like “I understand”; specify the consequences of each choice and avoid threatening language or scare tactics.
- Granular controls: Allow users to enable analytics while rejecting advertising or social media cookies.
- Accessibility and multi‑language support: Ensure compliance with WCAG 2.1/2.2 (keyboard navigation, colour contrast, screen reader support) and provide consent interfaces in the user’s language.
- Avoid pre‑selected boxes or hidden controls: Pre‑ticked options and hidden toggles violate GDPR requirements for explicit consent.
Best‑practice recommendations for 2026
- Audit your consent banners for dark patterns. Check button size, colour contrast, wording and the number of clicks needed to reject. Ensure accept and reject options are equally easy to use.
- Implement Consent Mode v2 correctly. Use a certified CMP, set default parameters to “denied” and avoid sending any data until consent is given. Test across devices and geographies to ensure consistent behaviour.
- Respect regional differences. Build geolocation logic into your CMP so that users in opt‑in jurisdictions (EU, Brazil, India) see strict banners while U.S. visitors may receive opt‑out flows. When location is uncertain, default to the strictest standard.
- Maintain detailed records. Keep logs of consent signals, preferences and any automated signals (like GPC) to demonstrate compliance during audits.
- Monitor legislative developments. Follow the progress of the Digital Omnibus, DPDP rulemaking and U.S. state laws. Be ready to honour browser/OS‑level privacy switches and universal opt‑out mechanisms.
- Invest in first‑party data and server‑side tagging. With third‑party cookies in flux, build direct relationships with customers, implement server‑side tag management and explore Privacy Sandbox APIs for measurement.
Conclusion
The evolution of Consent Mode v2, combined with legal reforms and enforcement actions, signals that cookie consent is becoming more standardised yet more demanding. Regulators are closing loopholes (e.g., one‑click reject, equal prominence) and punishing dark patterns with substantial fines. At the same time, technological shifts such as server‑side tagging and RTB controls enable privacy‑respecting analytics and advertising. Organisations that embrace ethical consent practices, invest in first‑party data infrastructure and stay abreast of multi‑jurisdictional requirements will not only avoid penalties but also build trust and resilience in a privacy‑conscious marketplace.