1. What Is Unity Hub? Unity Hub is a desktop application that manages your Unity Editor installations, projects, licenses, and add‑ons from a single interface. It allows developers to install, update, and switch between multiple Unity Editor versions seamlessly. This is essential when working on different projects that require specific Unity releases (e.g., 2020.3 LTS, 2021.3 LTS, 2022.3 LTS, or 2023.x tech stream). 2. Understanding Unity Editor Version Numbering Unity versions follow the format: YYYY.MAJOR.MINOR.PATCH (or with suffixes like f1 , f2 , p1 , b1 ).