The answer to 'skylight cracked' is that a cracked skylight is a common roofing issue that needs prompt attention. Skylights can crack due to a variety of reasons, including age, weathering, impact damage, or thermal stress. Symptoms include visible cracks, leaks, and drafts around the skylight frame.
The best solution depends on the extent of the damage. Small cracks may be able to be repaired with a sealant or epoxy, but larger cracks or significant damage will likely require full skylight replacement. This is generally a job best handled by a professional roofer, as they have the proper tools, skills, and safety equipment to ensure the work is done correctly and safely.