When do judaism use sign and symbols?

Judaism uses signs and symbols during significant rituals, ceremonies, and religious observances. Key symbols include the Star of David, the menorah, and the mezuzah, which represent Jewish identity and faith. Signs are also present in rituals such as the wearing of tefillin during prayer, and the use of challah bread and wine during Shabbat and holiday celebrations. These symbols and signs serve to connect practitioners to their heritage and to express their beliefs.