The answer to 'why is my soffit cracked' is that soffits can crack due to a few common causes, including exposure to the elements, structural issues, or improper installation. Soffits are the horizontal boards that run along the underside of your home's roof overhang, and they can become cracked over time from weathering, moisture damage, or structural movement in the home.
Some of the most frequent causes of cracked soffits include water damage from leaks, UV damage from sunlight, and expansion/contraction from temperature changes. Soffits that were not properly installed or secured may also start to crack and deteriorate. If the cracking is severe, it could be a sign of more serious structural problems with your roof or home's framing.