The "Eszett," also known as "sharp S" or "ß," is a unique letter in the German alphabet. It represents a voiceless s sound, similar to the English "s" in "see." The Eszett is used in specific contexts, primarily in the German language, and is often found in words like Straße (street) and Fuß (foot). Unlike other letters, the Eszett does not have an uppercase form, although it is sometimes replaced by "SS" in all-caps situations. Its usage is governed by specific spelling rules, making it an important aspect of German orthography.