ESP32 Libraries are software components that enable developers to use the capabilities of the ESP32 microcontroller in IoT projects. The ESP32 supports Wi-Fi, Bluetooth, and low-power operation, making it ideal for connected devices. Libraries simplify tasks such as MQTT communication, sensor integration, and power management. They are often compatible with the Arduino IDE and PlatformIO, lowering the barrier for beginners. With these libraries, developers can quickly build IoT solutions without writing low-level code. The strong community support makes ESP32 one of the most popular IoT platforms.