Claiming personal super contributions as a tax deduction is an effective way of reducing your taxable income. The lower your taxable income the less tax you pay.
If you are younger than 67 years of age then you would be eligible. See how below
Personal super contributions | Australian Taxation Office
Also consider using unused concessional caps from earlier years to increase your deduction above the $30,000 cap. Information in link
Concessional contributions cap | Australian Taxation Office