A rendering engine is a software component that converts data into visual representations, often used in web browsers and graphic design applications. It interprets code, such as HTML and CSS, to display web pages or images on a screen. Rendering engines ensure that the content is presented accurately and efficiently, taking into account various factors like layout, colors, and fonts. There are different types of rendering engines, including Rasterization engines, which create images by converting vector graphics into pixels, and Ray Tracing engines, which simulate light behavior to produce realistic images. Popular rendering engines include WebKit, used by Safari, and Blink, used by Google Chrome.