Other contributors have said "What dose the Iwo Jima memorialize?" is the same question as "What does the Iwo Jima statue memorialize?" If you believe that these are not asking the same thing and should be answered differently, click here
It depicts the raising of the US flag on Mt. Suribachi, the highest point on Iwo Jima, during the battle to capture the island from Japan near the end of WW2. It is seen as a memorial to the Marines who died there.
It's called the "Marine Corps War Memorial" not the Iwo Jima statue and to be honest you have bad grammar (No offense) but if you want the location well it's in the U.S.A. N Meade St, Arlington, VA...