Computer speakers are sound devices that play audio from your computer. They have been around for a long time, but the first electric speakers were patented with the telephone by Alexader Graham Bell in 1876. From its use in telephones it spread to other areas, including cinema and record playback.
It is fair to say that loudspeakers have come a long way from that first version to today's high-tech loudspeakers. Today's technology allows the quality of the simplest speakers to be extremely high. So the sound clarity that can be achieved with computers today is excellent.
Having speakers with optimal audio makes tasks involving sound easier and improves the user experience. There is a lot of variety on the market, differing in quality, style and features. But regardless of your needs as a user, a good sound system is almost certainly part of what you want.