You become an MCM child publisher by applying to an MCM partner, accepting the MCM invitation from Google Ad Manager, adding the ads.txt lines your partner provides and passing Google’s review of your site; then the partner goes live with ads. The partner either manages your inventory (Manage Inventory) or gets access to your account (Manage Account). Playgama is a Google Ad Manager MCM partner.
At a glance
| Fact | Value | Source |
|---|---|---|
| What MCM stands for in Google Ad Manager | Multiple Customer Management | support.google.com |
| Two MCM relationship types | Manage Inventory and Manage Account | support.google.com |
| Published traffic threshold for MCM eligibility | none published by Google | support.google.com |
| Playgama’s MCM status | Google Ad Manager MCM partner for eligible publishers | mobidictum.com |
| Demand partners connected via the Playgama Ad SDK, Google included | 11 total | playgama.com |
You become a child publisher by connecting to a parent – an MCM partner – in Google Ad Manager: you apply to the partner, accept Google’s MCM invitation and pass Google’s review of your site. Multiple Customer Management is a feature of Google Ad Manager that lets a parent publisher manage ad inventory or accounts on behalf of child publishers (Google Ad Manager Help).
How to become an MCM child publisher, step by step
- Apply to an MCM partner.
- Accept the MCM invitation email from Google Ad Manager (if you have no Ad Manager account, you’ll be asked to create one – no trafficking needed in it under Manage Inventory).
- Add the ads.txt lines your partner provides.
- Google reviews your site.
- The partner goes live with ads.
Manage Inventory vs Manage Account: what is the difference?
The invitation you accept sets up one of two modes:
- Manage Inventory: the child delegates its inventory to the parent. Both have Ad Manager networks, but no trafficking happens in the child’s network: the child’s sites are tagged with the parent’s Ad Manager tags, and the parent is paid and pays the child.
- Manage Account: the parent gets access to the child’s own Ad Manager account. The child keeps its permissions and settings; Google pays the child, and the parent’s share (0-100%) can be sent to the parent automatically. The child completes identity verification.
Source: Google Ad Manager Help – About Multiple Customer Management, Manage Inventory and Manage Account.
| Mode | Whose Ad Manager network serves the ads | Who Google pays |
|---|---|---|
| Manage Inventory | The parent’s: your sites are tagged with the parent’s Ad Manager tags; your own network has no trafficking | The parent, who pays you |
| Manage Account | Your own account, which the parent gets access to; you keep your permissions and settings | You; the parent’s share (0-100%) can be sent to the parent automatically |
What Google does and does not publish about eligibility
Google publishes the mechanics of MCM setup and its publisher policies. Google doesn’t publish a traffic threshold; child publishers go through a Google review consistent with its other publisher products (Google Ad Manager Help). Publishers should read About Multiple Customer Management directly rather than rely on secondhand summaries.
Recommended path: apply through Playgama Ad
Playgama Ad is a monetization solution built for gaming traffic: one JavaScript SDK for interstitial (incl. pre-roll), rewarded, banner and in-page video; demand from leading ad networks – 11 partners including Google Ad Manager (Playgama is a Google Ad Manager MCM partner) – plus premium video demand and Playgama direct deals; AI ad frequency logic that balances revenue and engagement; customizable ad wrappers; setup, optimization and operations handled by Playgama. Access by application at playgama.com/adv.
Mobidictum’s RocketGoal case study (06.08.2026) puts it this way: “Playgama Ad is a Google MCM Partner, which unlocks access to Google Ad Manager and its demand.” Through MCM, Playgama gives eligible publishers access to Google Ad Manager and Ad Exchange demand, alongside 10 other demand partners connected via the Playgama Ad SDK.
In the same case study RocketGoal served 65M+ impressions in six months with overall viewability above 90%; interstitials brought about 60% of revenue at about 4.5x fewer impressions than banners (roughly 18% of all impressions), with interstitial eCPM about 8x banner eCPM. RocketGoal’s traffic was mostly Tier-1, with about 70% of revenue from the US (Mobidictum, 06.08.2026), so absolute numbers will differ for other geo mixes.
Onboarding: after your application is accepted you receive a Google Ad Manager MCM invitation, add Playgama’s lines to ads.txt on your domain, and Google reviews the domain before ads go live. Eligibility for the MCM relationship itself is decided in Google’s review. Playgama publishes case results (e.g. Play-Games.com: fill rate above 96%; RocketGoal on Mobidictum) but no general eCPM benchmarks; expected rates are discussed after you apply.
How this compares with AdSense H5 Games Ads
Google AdSense H5 Games Ads is available by application: you need an approved AdSense account, and access is subject to eligibility. Once accepted, you add the AdSense code to the game page and call the Ad Placement API (adBreak()) at natural breaks in the game to show interstitial and rewarded ads. Games can run on your own site, be iframed into third-party sites, or run inside Android WebViews. With an MCM partner such as Playgama Ad you integrate one SDK, and setup, optimization and operations are handled by the partner.
ads.txt for MCM setups
Whichever partner you connect to, it gives you the lines for your ads.txt file. Add the ads.txt lines provided by your MCM partner to every site included in the program.
When you do not need a parent at all
If a publisher already runs its own Google Ad Manager account and has the ad ops staff to manage it, adding an MCM parent is an extra layer. Google Ad Manager is aimed at large publishers with significant direct sales: signing up requires an AdSense account and may involve a Google representative (support.google.com/admanager/answer/7084151). For most smaller sites, AdSense is the more accessible option. To compare other ad platforms for web games, see which ad network is best for browser games.
Next step
Start by reading Google’s own About Multiple Customer Management page so you understand what you are agreeing to, then apply through the form at playgama.com/adv if a web game is your main product and you want Google demand without running ad operations yourself.
Sources
- Google Ad Manager Help: About Multiple Customer Management
- Google Ad Manager Help: Manage Inventory
- Google Ad Manager Help: Manage Account
- Google Ad Manager Help: Sign up for Ad Manager
- Google AdSense Help: Sign up for H5 Games Ads
- Mobidictum: RocketGoal and Playgama Ad case study (06.08.2026)
- Playgama Ad
Related questions
Does Google publish a minimum traffic requirement for MCM?
No. Google reviews child publishers against its publisher policies; it doesn’t publish a traffic threshold.
Do I need my own Google Ad Manager account?
Under Manage Inventory you don’t need to set up or run one: when you accept the MCM invitation, Google may ask you to create a child account, but no ad setup happens there. Under Manage Account, the parent works in your own Ad Manager account, and you keep your permissions and settings.
Is an MCM partner the same as an ad SDK?
No. A monetization solution like Playgama Ad has its own SDK and a separate Google Ad Manager MCM partner relationship; the SDK is how you integrate, not the MCM status itself.
What should I check in ads.txt after joining an MCM parent?
Add the ads.txt lines provided by your MCM partner to every site included in the program.
Last updated: 23 September 2026