E-Ink, or electronic ink, is a display technology that mimics the appearance of ink on paper. It is commonly used in e-readers like the Amazon Kindle and offers a reading experience similar to traditional books, with low power consumption and excellent readability in bright light. The technology works by using tiny microcapsules filled with black and white particles that rearrange themselves to form text and images. This allows for a paper-like experience, making it ideal for long reading sessions without causing eye strain, unlike traditional screens that emit light.