Fighting Islamic State with social media instead of sending more troops to Iraq and Syria will be part of Australia's commitment to Western allies that have agreed to step up the fight against the extremist group. 
Australia was part of a "multifaceted" campaign by the seven-country coalition that met in Paris on Thursday and would encourage other nations to join the coalition, Defence Minister Marise Payne said.
British Defence Secretary Michael Fallon, US Secretary of Defence Ashton Carter, French Defence Minister Jean-Yves Le Drian and Senator Payne agreed that they will discuss how their counter-terrorism efforts could be broadened at a meeting of NATO defence ministers in Brussels next month.
"It's more than just a military campaign," Senator Payne said. "It requires engagement in the modern battle platform, if you like, and that includes social media.
"The Prime Minister, I know, raised it with Secretary Carter and I'm sure with President Obama on his recent visit. We pursued it further today."
Australia last week formally rejected a US request for more military help against IS, because Australia was already making substantial contribution to the fight against terrorism.
Senator Payne said the allies also needed to help stabilise areas where Western forces had succeed in fighting IS.
"We know that as we make gains in places such as Ramadi, we must ensure that stabilisation continues after those gains, and that we support local communities in re-establishing themselves and engaging in their own country."