Social media giants will be forced to explain what steps they are taking to keep Australians safe on their platforms, as part of a new inquiry.
The government on Wednesday unveiled the probe to scrutinise big tech companies such as Facebook and Twitter.
The inquiry will examine the online harms faced on social media, as well as the impact on mental health and effectiveness of safety measures.
The inquiry has bipartisan support but Labor communications spokeswoman Michelle Rowland said it had taken too long for the government establish it.
"The announcements (from the government) comes early ... but the action comes late," she said.
Prime Minister Scott Morrison said the inquiry would ensure social media companies would be held to account.
"Mums and dads are rightly concerned about whether big tech is doing enough to keep their kids safe," he said.
"Big tech created these platforms, they have a responsibility to ensure they're safe."
The inquiry will run for three months over summer with a final report due by February 15.
The committee is expected to invite prominent individuals such as Adam Goodes, Tayla Harris and Erin Molan along with Facebook whistleblower Frances Haugen to give evidence.
Ms Haugen revealed Facebook knew about the negative impact Instagram had on its teenage users and how Facebook prioritised profits over safety.
Communications Minister Paul Fletcher said the recent revelations amplified concerns about Facebook and social media use.
"This inquiry will be a very important opportunity to examine the practices of these companies, and whether more needs to be done," he said.
"(It) will give organisations and individuals an opportunity to air their concerns, and for big tech to account for its own conduct."
The government also on Wednesday revealed more detail surrounding its anti-trolling legislation, with an exposure draft released.
Under the proposal, a complaints mechanism would allow anyone who thinks they have been bullied or defamed online to require social media platforms to take down offending posts.
Should the platform fail to comply, a court process would allow the person to require social media companies to provide the identity of anonymous posters.
"For too long these are social media platforms have allowed trolls to get away with spewing bile and hate online with no consequences," Mr Fletcher told parliament.
Labor deputy leader Richard Marles said his party supported the thrust of what the government was doing.
Australian Associated Press