When you sign into Chrome browser, your bookmarks, extensions, apps, history, passwords, and other settings, are saved to your Google Account.
Any changes you make on one device sync to all the devices where you sign into Chrome with the same account.
Signing into Chrome also makes your Google services, like Drive/Docs, Classroom, YouTube, and Search easier to use, since you'll already be signed in to them.
Your @wccs.nsw.edu.au email address is a Google Apps for Education account. To sign in follow the steps below:
If you wish, you can customise what you want to sync by going to Settings. Within the Sync option you can choose what information to share across other devices where you're signed into Chrome.