AI applications refer to the various ways artificial intelligence is utilized to solve problems and enhance processes across different industries. Common examples include chatbots for customer service, recommendation systems in online shopping, and image recognition in security systems. These applications help automate tasks, improve efficiency, and provide personalized experiences. In healthcare, AI applications assist in diagnosing diseases and analyzing medical images, while in finance, they help detect fraudulent transactions. Additionally, self-driving cars use AI to navigate and make decisions on the road. Overall, AI applications are transforming how we live and work by making systems smarter and more responsive.