Why does the brake pedal feels soft?

A soft brake pedal can indicate several issues, such as air in the brake lines, which compresses and reduces the hydraulic force. It could also be due to a brake fluid leak, low brake fluid levels, or worn brake components like pads or rotors. Additionally, a failing master cylinder might not generate enough pressure, leading to a spongy feel. It's important to address this promptly, as it can compromise braking performance and safety.