Optus' Digital Thumbprint is a free in-school program which assists young people to be safe, responsible and positive online.

The program visited Riverside High School students on Friday to discuss digital identities.

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Grade 9 student Charlotte Mattern said she learnt potential employers could search her on the internet and find out information they might not have otherwise been aware of.

The student said she would be more careful about what she posted online in the future.

Peer and grade 9 student Gabby Pyka said she learnt what types of online behaviour potential employers may see as good or bad.

"I've learnt that employers can check up on what we are doing and find out if we have done anything good or bad," she said.

Both students were going home to Google themselves and see what information did pop up.

"I think its important for [people] to find out what their digital footprint is," Miss Pyka said.

The visit to Riverside High School was part of a week-long roadshow across Tasmania, with the program visiting more than 1400 students in the state.

Digital Thumbprint facilitator Dom Phelan said though students and teenagers were fairly tech savvy, many were unaware what they were agreeing to when it came to terms and conditions.

"It would be fair to say a lot of students didn't know what the rules and regulations were [around social media platforms]," he said.

"[Social media] is a very powerful tool, but unfortunately ... it can be used as a weapon."

For more information visit digitalthumbprint.com.au.