--- title: Digital Markets Act DMA — definition | RGM® Glossary url: https://realgrowthmatters.com/glossary/digital-markets-act/ updated: 2026-06-10 source_html: https://realgrowthmatters.com/glossary/digital-markets-act/ --- # Digital Markets Act (DMA) D·M·Anoun (law) Rules for the platforms everyone depends on — and the reason your consent banners, signals, and choice screens changed in 2024. Term : Digital Markets Act (DMA) Targets : Designated gatekeeper platforms Gatekeepers named : September 2023 Obligations live : March 7, 2024 ## Forms & parts of speech DMA · noun The EU's gatekeeper law. "Consent Mode v2 exists because the **DMA** made Google prove consent before combining EEA user data." ## Definition in plain terms The Digital Markets Act (DMA) is the EU regulation governing the market power of 'gatekeepers' — the platforms business users cannot avoid. The European Commission designated the first gatekeepers (Alphabet, Amazon, Apple, ByteDance, Meta, Microsoft, later Booking) in September 2023, and their obligations applied in full from March 7, 2024. Unlike GDPR, which regulates everyone's data handling, the DMA regulates a named list's conduct — but its compliance ripples land on every marketer using those platforms. ## The mechanics The obligations that touch marketing: gatekeepers must obtain consent before combining personal data across their own services and with third-party data (the requirement behind CONSENT-MODE-V2's mandatory signals and Meta's EU consent flows — platform compliance passed through as advertiser homework); they must not self-preference their own services in rankings; they owe business users data access and advertisers/publishers transparency on ad pricing and performance metrics; messaging interoperability and choice screens open closed ecosystems at the edges; and app-store steering rules loosen the gardens' tollgates. For marketers the practical surface is concrete. EEA measurement and audience features now run through consent signaling — unconsented EEA users vanish from remarketing and granular measurement, with CONVERSION-MODELING filling the gaps. Ad-transparency rights formally entitle advertisers to better pricing and verification data than the gardens historically volunteered (worth requesting, not just admiring). Choice screens and steering shifts move some traffic acquisition battlegrounds — default-search and app-distribution assumptions baked into channel plans deserve periodic re-checks as enforcement proceeds. And enforcement is live, not theoretical: the Commission opened non-compliance proceedings against several gatekeepers within weeks of the deadline, and the first fines arrived in 2025 — the rules are being litigated into shape, which means the downstream requirements keep moving. ## When it matters The DMA matters to any marketer with EEA audiences, because gatekeeper compliance becomes advertiser plumbing — consent signals, changed defaults, modeled data where observation used to be. It matters strategically to anyone whose distribution depends on a gatekeeper's choices: search defaults, app stores, and feed algorithms are now partially regulated terrain. The discipline is downstream vigilance: wire the consent infrastructure properly, claim the transparency data the law entitles you to, and re-check platform-dependent assumptions each time enforcement reshapes a gatekeeper's behavior. (General information, not legal advice.) **Worked example.** A travel-booking brand's EEA performance 'collapses' in March 2024 - remarketing lists shrink, conversion counts drop - and the first diagnosis blames the market. The real cause is the DMA deadline: its gatekeeper platforms now require consent signals before combining and using EEA user data, and the brand's consent stack was never wired to send them. The fix is the Consent Mode v2 project it had deferred - all four signals, advanced mode, region-correct defaults - which restores modeled measurement and refills eligible audiences. Then the team goes on offense with the law's other hand: it formally requests the ad-pricing and verification transparency the DMA entitles advertisers to, and uses the improved fee visibility in its next agency negotiation. The quarter's lesson sticks as policy: every gatekeeper compliance deadline now gets a downstream-impact review two months early, because platform law arrives as advertiser plumbing. **Failure modes to watch.** Reading consent-driven EEA reporting drops as demand drops; consent stacks never wired for the signals gatekeeper compliance demands; transparency rights the law grants but no one requests; channel plans assuming defaults and steering rules enforcement keeps changing; and treating named-gatekeeper law as someone else's problem until the deadline lands on your dashboard. ## Synonyms & antonyms ### Synonyms Digital Markets ActDMAEU gatekeeper regulation ### Antonyms GDPR (general data law)unregulated platform conduct ## Origin & history The DMA entered into force in November 2022 as the EU's answer to platform market power — the Commission designated the first six gatekeepers in September 2023, full obligations applied March 7, 2024, and non-compliance proceedings began within weeks, making it the fastest-moving layer of the EU's digital rulebook alongside its sibling, the Digital Services Act. Etymology: [source](https://digital-markets-act.ec.europa.eu/index_en). ## Usage trends Search interest for this term over the last five years: [View interest-over-time on Google Trends →](https://trends.google.com/trends/explore?q=digital%20markets%20act&date=today%205-y) ## Common questions What is the Digital Markets Act? : The EU regulation imposing conduct obligations on designated gatekeeper platforms — consent before data combination, no self-preferencing, ad transparency, interoperability — with gatekeepers named September 2023 and obligations live March 7, 2024. How does the DMA affect marketers? : Through gatekeeper compliance passed downstream — consent signaling now gates EEA measurement and audiences (the force behind Consent Mode v2), ad-transparency data is claimable, and platform defaults keep shifting under enforcement. How is the DMA different from GDPR? : GDPR regulates everyone's personal-data handling; the DMA regulates a named list of gatekeepers' market conduct — different laws, converging on the same advertiser plumbing. ## Related tools & calculators - tool[CAC calculator](/tools/cac-calculator/) - tool[LTV:CAC calculator](/tools/ltv-to-cac-ratio-calculator/) ## Resources & people to follow - reference[European Commission — Digital Markets Act](https://digital-markets-act.ec.europa.eu/index_en) - reference[Wikipedia — Digital Markets Act](https://en.wikipedia.org/wiki/Digital_Markets_Act) - referenceRGM analysis — platform law arrives as advertiser plumbing; review every gatekeeper deadline two months early Curated, non-competitor resources verified per term. ## Related training - module[Performance marketing](/training/performance-marketing-foundations/) ## Disciplines Areas of marketing where digital markets act (dma) is a core concern: [Performance marketing](/training/performance-marketing-foundations/)[Growth strategy](/training/growth-marketing-foundations/) ## Read next ## Related terms [GDPR](/glossary/gdpr/)[Consent Mode v2](/glossary/consent-mode-v2/)[Digital Services Act](/glossary/digital-services-act/)[CCPA](/glossary/ccpa/)[Conversion modeling](/glossary/conversion-modeling/) ## Sources 1. trends[Google Trends — "digital markets act"](https://trends.google.com/trends/explore?q=digital%20markets%20act&date=today%205-y)