What are the key features of a snail?

Snails are characterized by their soft, elongated bodies and a coiled shell that provides protection. They possess a muscular foot for movement and a unique radula, a tongue-like organ with tiny teeth, for feeding. Snails also have tentacles on their heads that serve as sensory organs for detecting light and smells. Additionally, many snails can produce mucus to aid in locomotion and prevent desiccation.