Use "___ needs to be ___" to talk about work that someone needs to do:

It needs to be done soon.

English speakers use "be __" to avoid saying exactly who should do something. For example, you might say this this to an employee:

The files in this folder all need to be reviewed.

Instead of this:

You need to review the files in this folder.

The first one sounds softer and less direct.

Or you can say "___ needs to be ___" if you don't know who should be responsible:

That old building needs to be knocked down.

Use "___ doesn't need to be ___" when it's OK not to do something:

No, they don't need to be cooked. You can eat them just like that.