Categories are groups or classes in which similar items, concepts, or ideas are organized. This organization helps in categorizing anything, like:
1. Subject Categories: Like literature, science, history.
2. Product Categories: Like electronics, clothing, groceries.
3. Genres: Like fiction, non-fiction, drama.
4. Demographic Categories: Like age groups, income levels.
Categories are used to organize and organize information, so that similar items can be kept together for easier comparison and analysis.