Ideally, avoid it. They were designed for 220 film (thus the '24', as the '12' was for 120 film - refers to the number of shots per roll), which is scarce, expensive and often more difficult to have developed. Additionally, compared to the number of choices for emulsions in 120, there are few in 220 and they are diminishing by the year.
Online there are people who have used shims and other modifications to run 120 film through their 24s successfully, but these are very much DIY solutions for what is otherwise a very nice paperweight.
Not put off? Check both viewing and taking lens. For the taking lens, put the aperture to the widest setting and shutter speed to bulb, and look through the back whilst the shutter is held open. Like any camera glass, ideally free of haze & fungus. Slow speeds often suffer on old TLRs, so check 1 second, 1/2s etc.