It's not always easy to ignore nasty comments and messages. But, just like Marcus says, you should try not to pay too much attention to them whenever you can.
A better internet starts with you. You should always remember to be a good friend even in the digital world.
Check out this article to discover 5 ways you can make the internet a better place for everyone.
If you see something upsetting online, whether it's a message you've received or a mean comment you've read under someone else's post, the best thing to do is to tell a trusted adult about it.
If you're being bullied and you aren't sure who to speak to, Childline are always available on 0800 1111.