Oceanography is important for a variety of reason. I will talk about a few.
Oceanography is important to study because the worlds oceans are critically important for sustaining life on Earth. Maintaining ecological balance in the words ocean helps insure we are keeping the worlds carbon levels in check. A large percentage of the worlds oxygen comes from the oceans. If ecological balance should get tipped in the wrong direction it could be detrimental to sustaining life on Earth.
Also the oceans of the world are vast places who’s resources are virtually untapped. There is so much we don’t know. The cure for cancer or many other deadly disease of the world could be found in the ocean.
We need to continue to study and research and maintain the oceans of the world to help improve and sustain life on Earth.