Forward rendering is a graphics rendering technique where the scene is processed in a single pass. In this method, each object in the scene is rendered directly to the screen, applying lighting and shading effects as it goes. This approach is straightforward and works well for scenes with fewer light sources and simpler geometries. However, forward rendering can become less efficient with complex scenes that have many light sources. Each light must be calculated for every object, which can lead to performance issues. Despite this, it remains popular in applications like video games and real-time rendering due to its simplicity and ease of implementation.