The term "star types" refers to different classifications or categories of stars based on their characteristics such as size, temperature, luminosity and other properties. These classifications help astronomers understand more about a star's behavior, its life cycle, and how it may evolve over time. Some common star types include main-sequence stars like our Sun, giant stars, white dwarfs, neutron stars, and black holes. Each type of star has unique properties that set them apart from other classifications.