Bootstrap provides a set of tools, templates, and reusable components (such as buttons, forms, navigation bars, etc.) built with HTML, CSS, and JavaScript. Its primary aim is to simplify and speed up the process of web development by providing a consistent and flexible foundation that ensures compatibility across different devices and browsers. Bootstrap utilizes a grid system for layout management, responsive design features, and extensive pre-styled components, allowing developers to quickly create professional-looking websites with minimal effort. It also offers customizability through variables and mixins, enabling developers to tailor the framework to suit their specific project requirements.