Digital cameras tend to have quite a few more manual control settings today than they did even a few years ago. These settings allow you to adjust the automatic settings for a scene, giving you a better chance to end up with a properly exposed and focused image.
Even on today's point-and-shoot models, you're going to at least have a few options for controlling the most basic aspects of shooting photos. One of those settings you can control is the ISO.
However, this isn't the easiest setting to understand. To figure out how to make the most of your camera's ISO setting, just click the link to learn: What is ISO?