In modern times, the Star of David has become the premier Jewish symbol. This six-pointed star (hexagram), made of two interlocking triangles, can be found on mezuzahs, menorahs, tallis bags, and kipot. The flag of Israel has a blue Star of David planted squarely in the center.
Stars of David, Sterling Silver
Originally, the Hebrew name Magen David — literally, "Shield of David" — poetically referred to God. It acknowledges that their military hero, King David, did not win by his own might, but by the support of the almighty. This is also alluded to in the third blessing after the Haftorah reading on Shabbat: "Blessed are you God, Shield of David."
Stars of David, Bronze
So whether it is a blue star waving proudly on a flag, or a gold star adorning a synagogue's entrance, the Star of David stands as a reminder that, for the Jewish people, in God they trust.