Tiling in AVIF allows for the encoding of images to be done in parallel, using multiple CPU cores. This can significantly improve the speed of encoding, especially for large images. Tiling works by dividing the image into smaller rectangular areas, or tiles, which are then transformed and encoded independently. The size of the tiles can be varied depending on the needs of the application, and it is even possible to consider the entire image as a single tile. Tiling is an important feature of AVIF that helps to make it a more efficient and performant image format.