tools.google.com/dlpage/gaoptout - Google Analytics Opt To enable users to disable the collection of data about sites they visited, Google developed the Google Analytics Blocker. He instructs the script (ga.js, analytics.js, dc.js) not to send information to Google Analytics.
analytics.google.com - Google Analytics Detailed statistics service for website visits.
ads.google.com - Google Ads The world's largest contextual advertising system, with the most powerful tools of planning advertising campaigns.
google.com/admob - AdMob The AdMob platform is a technology from Google that will help you analyze user behavior and maximize your advertising revenue.