The nine-point serrated line indicates that Qatar is the ninth member of the "reconciled emirates" of the Arabian Gulf, in the wake of concluding the Qatari-British treaty in 1916.
The flags of Bahrain and Qatar are very similar, depicting the two countries historical links. However, there are important differences .They are :-
[a] The Qatar flag is longer and narrower in shape than the Bahrain flag
[b] The latter has an eight,not nine-point, serrated edge
[c] They have different shades of red, the Bahrain flag being lighter than the maroon of Qatar
[d] The white part on the flag of Qatar is proportionately longer than the white on the Bahrain flag
The Qatari flag can be seen mainly on public and governmental buildings, schools, ships and private cars.
More flags are also hoisted, especially around Doha, during important sports events, national celebrations and major diplomatic meetings.
The people of Qatar are immensely proud of their independent status, which is, of course, reflected in having their own national flag, which is totally different from those of Qatar's other neighbours, Saudi Arabia and the United Arab Emirates [U.A.E].