E-ink, or electronic ink, is a display technology that mimics the appearance of ink on paper. It uses tiny microcapsules filled with black and white particles that rearrange themselves when an electric current is applied, creating text and images. This technology is commonly found in devices like e-readers, which provide a comfortable reading experience similar to traditional books. One of the main advantages of E-ink is its low power consumption, allowing devices to last for weeks on a single charge. Additionally, E-ink displays are easily readable in bright sunlight, making them ideal for outdoor use. This technology has revolutionized the way people read and access digital content.