AI operates through algorithms that learn from large amounts of data to make decisions or predictions with minimal human intervention. Machine learning (ML), a subset of AI, focuses specifically on this aspect where machines can improve their performance over time without being explicitly programmed for each task they perform. Deep Learning is another subfield which uses layered neural networks that mimic the way humans learn and process information to solve complex tasks like image recognition or natural language processing (NLP).

AI has a wide range of applications across various industries including healthcare, finance, transportation etc., where it can help in improving efficiency, accuracy and decision-making. However, AI also raises ethical concerns such as privacy issues, job displacement due to automation or biases present within the training data which may result in unfair decisions by machines.

In conclusion, Artificial Intelligence is a rapidly evolving field that has already made significant impacts on our lives and continues to shape various industries with its potential for future advancements.