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User Acquisition

Ad Network

Also known asMobile Ad NetworkDemand SourceDSP

A platform that aggregates ad demand from many advertisers and matches it to publisher inventory through real-time auctions.

Key takeaways

  1. 01Ad network = the platform that aggregates advertiser demand and matches it to publisher inventory.
  2. 02Major 2026 networks: Meta, TikTok, Google (UAC), AppLovin, ironSource, Unity Ads, plus DSPs for programmatic.
  3. 03Self-attributing networks (SANs) — Meta, TikTok, Google — handle their own attribution; non-SANs need MMP wiring.
  4. 04Most publishers use mediation (waterfall or bidding) to play multiple networks against each other for higher eCPM.

An ad network is the platform that sits between advertisers and publishers — aggregating demand from many advertisers and matching it to publisher ad inventory through auctions. From the advertiser side, an ad network is the tool you log into to launch campaigns, set budgets, target audiences, upload creative. From the publisher side, an ad network is the demand source that fills your ad slots and pays you per impression / click / install.

Major mobile ad networks in 2026

SAN vs non-SAN matters for attribution

Most mature apps use both — SANs for the broad-reach demand, in-app networks and DSPs for incremental scale or targeted strategies.

Mediation is the publisher-side mechanism for playing multiple ad networks against each other to maximize eCPM. The mediation platform (AppLovin MAX, ironSource LevelPlay, Google Admob Bidding) runs each impression through a waterfall or real-time auction across multiple networks. Each network bids what it's willing to pay for that impression; the highest bid wins. More networks in mediation = higher eCPM, generally — until management overhead exceeds the marginal lift.

Choosing networks as an advertiser: start with the SANs (Meta, TikTok, Google) — they have the broadest reach, the best ML-driven optimization, and the simplest attribution wiring. Layer in-app networks once SAN spend is meaningful and you have creative variants ready. Add programmatic DSPs only when you have a clear targeting hypothesis they uniquely enable.

Quick answers

What is an ad network in mobile?

An ad network is the platform that aggregates advertiser demand and matches it to publisher ad inventory through real-time auctions. Advertisers use it to launch campaigns; publishers use it to monetize inventory. Major mobile ad networks in 2026: Meta, TikTok, Google (UAC), Apple Search Ads, AppLovin, ironSource (Unity), Unity Ads, plus programmatic DSPs.

What is a self-attributing network (SAN)?

A **self-attributing network** is one with a direct attribution agreement with MMPs (AppsFlyer, Adjust, Singular). The network sends conversion postbacks directly to the MMP, which deduplicates and assigns credit across all sources. Major SANs: Meta, TikTok, Google Ads, Apple Search Ads, Snapchat Ads. Non-SAN networks (most in-app networks, DSPs) require click-tracker URL wiring instead.

Which ad networks should I start with for my mobile app?

Start with the major SANs: Meta (Facebook + Instagram), TikTok, Google UAC. These three reach 80%+ of mobile users in most markets, have the most sophisticated ML-driven optimization, and the simplest attribution wiring. Layer in-app networks (AppLovin, ironSource) once SAN spend is meaningful and you have creative variants ready. Add programmatic DSPs only when you have a clear targeting hypothesis they uniquely enable.

What is ad mediation?

**Mediation** is the publisher-side mechanism for playing multiple ad networks against each other to maximize eCPM. The mediation platform (AppLovin MAX, ironSource LevelPlay, Google Admob Bidding) runs each impression through a waterfall or real-time auction across multiple networks. Each network bids what it's willing to pay; the highest bid wins. More networks usually = higher eCPM, until management overhead exceeds the marginal lift.

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