"Lossless" refers to a method of data compression that allows the original data to be perfectly reconstructed from the compressed data. This means that no information is lost during the compression process, making it ideal for applications where quality is crucial, such as in audio files or images. Common lossless formats include FLAC for audio and PNG for images. In contrast to lossy compression, which sacrifices some data to reduce file size, lossless compression maintains the integrity of the original content. This is particularly important for professionals in fields like music production or graphic design, where preserving the highest quality is essential for the final product.