unit1; d1

D1

having a safe secure password will ensure that nobody can get onto your account and into your files.

logging off properly after you've used a computer makes sure that there is no way for someone else to get onto your account.

select the people you wish to see your profile and set them as authors. This will mean that only  they can view your things making your items more safe.

If you clean your internet history regularly it will prevent others going onto the internet history and seeing what you've been on and maybe getting onto it.