Radio buttons and check boxes are out of place in most worksheets. However, when added to form-based sheets, you can use them to conveniently specify a single mutually-exclusive choice (radio buttons) or multiple non-exclusive choices (check boxes).
Now that you know how these controls work, you may want to explore some of the other options in the Form Controls group. A List Box, for example, is a scrolling list that you can use when creating radio buttons would be inconvenient—that is, when there are far too many options. You could use one to present a list of all states, provinces, or countries, for example.