This is a test of commonsense. Complete the next sentence:

How to get rollback on wikipedia
Create an account.
You need to be a registered user in order to get rollback.
Read wikipedia's page about vandalism to find out what vandalism is and how you can spot it.
During your first few days on the site, use the recent changes page to find edits that are vandalism and click " undo " to revert them. You'll become an autoconfirmed user after 4 days and having made at least 10 edits.