The Star of David is an important symbol of the people of Israel and the Jewish religion. This is why it can also be seen on the ensign. It is usually sent during the festival of lights, Chanukah.
The star of david emoji was introduced in 1995 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols
category. Because the star of david emoji has been around for quite some time, it should display correctly in the majority of operating systems.