Integrating AdMob in React Native Expo guide covers setting up and implementing different types of ads in your app.Prerequisites include a React Native Expo project, AdMob account, Google Play Developer account, and attention to detail.Options for implementation include Expo Ads AdMob and React Native Google Mobile Ads, each with its pros and cons.Step 2 involves setting up a Google AdMob account, adding a new app, and creating ad units with unique IDs for apps.Configuring test devices, choosing appropriate ad formats, and obtaining App and Ad Unit IDs are essential steps.The guide compares Expo Ads AdMob and React Native Google Mobile Ads, recommending the suitable one based on project type.Configuration guides are provided for each option, including steps to configure app.json for AdMob and creating AdMob components.Implementation examples for Banner Ads, Interstitial Ads, and Rewarded Ads within your app are detailed.Performance optimization tips, recommended additional packages, and handling consent and privacy for user data are discussed.Troubleshooting tips, concluding with the importance of following Google's guidelines for successful AdMob integration, are highlighted.