One meaning of "schmuck" is "jewelry" or "finery". This is the most common meaning of the word. For example, you could say "Sie trägt viel Schmuck" (She wears a lot of jewelry).
Another meaning of "schmuck" is "decoration" or "ornament". For example, you could say "Das Haus ist mit viel Schmuck verziert" (The house is decorated with a lot of ornaments).
Finally, "schmuck" can also be used as an adjective to mean "beautiful" or "handsome". For example, you could say "Sie ist eine schmucke Frau" (She is a beautiful woman).
However, it is important to note that the word "schmuck" can also have a negative connotation. In some cases, it can be used to mean "stupid" or "idiot". This is not the most common meaning of the word, but it is still important to be aware of it.
Therefore, when using the word "schmuck", it is important to be aware of the context in which it is used. If you are not sure what the word means, it is best to ask a native German speaker.