I already have a working mobile app and now I want it to start earning through advertising. I have decided that ads will be the sole monetisation channel, aimed at an adult user base, so the integration must respect content policies suitable for 18+ audiences without becoming intrusive. Here is what I expect from you: • Select and configure a reliable ad network (AdMob, Unity Ads, or a comparable option) that pays out consistently. • Embed the ad units directly in the existing codebase, placing them where they generate revenue yet keep the user experience smooth. • Activate basic analytics so I can monitor fill-rate, eCPM and overall income from day one. • Run a round of real-device testing (Android and/or iOS, depending on which source files you receive) to confirm ads appear correctly, respect GDPR/CCPA prompts, and do not trigger policy violations. • Provide concise hand-off notes showing where the new code lives and how to swap networks or creatives later. You will receive the current source project and any keys you need; on delivery I should be able to upload a new build to the store, switch on production traffic, and start seeing revenue roll in.