What is an "AI Model"?
An AI model, also called a machine learning model, is a configuration file (or files) created using machine learning techniques. What the AI model consists of, exactly, depends on what program will use it. Fundamentally all AI models are files containing settings (sometimes called parameters or weights) that were configured not by a human one by one, but automatically by a computer program called the training program.
Training an AI refers to running this training program to automatically and iteratively adjust the settings of the AI model, until a configuration is found that produces a desired result in the program that uses the AI model.