Why is there several categories of mobile devices?

There are several categories of mobile devices to cater to diverse user needs, preferences, and use cases. For instance, smartphones prioritize communication and functionality, while tablets offer a larger screen for media consumption and productivity. Additionally, wearables like smartwatches focus on fitness tracking and quick notifications, while specialized devices such as e-readers serve niche markets. This segmentation allows manufacturers to target specific audiences and provide tailored features.