Google Ads (previously Google AdWords, before July 24, 2018) is an online advertising platform developed by Google, where advertisers pay to display brief advertisements, service offerings, product listings, video content, and generate mobile application installs within the Google ad network to web users.
Google Ads has evolved into Google's main source of revenue, contributing to Google's total advertising revenues of US$95.4 billion in 2017. AdWords offers services under a pay-per-click (PPC) pricing model. Although an advanced bidding strategy can be used to automatically reach a predefined cost-per-acquisition (CPA), this should not be confused with a true CPA pricing model.
Sales and support for Google's AdWords division in the United States is based in Mountain View, California, with major secondary offices in Hyderabad, Dublin, Singapore, Ann Arbor and New York City. The third-largest US facility is the Googleplex, Google's headquarters, which is located in Mountain View, California. Google AdWords engineering is based at the Googleplex, with major secondary offices in Los Angeles and New York.
As of June 2018, Google derives 86% of its total revenues through trading advertising inventory through AdWords, DoubleClick AdExchange, and DoubleClick Bid Manager, among others.