This document discusses how artificial intelligence and machine learning are being applied in pay-per-click advertising. It provides definitions of AI and machine learning, and gives examples of how they are used in areas like automated bid management, ad rotation, and opportunities in the Google Ads interface. The document also outlines several automated bidding options in Google Ads like Target CPA, Target ROAS, and Enhanced CPC that utilize machine learning. It notes how these options can analyze contextual signals to optimize bids in real-time.