I've written on this topic here before.
Effective "Large C" Compliance and "Big G" governance, particularly with regard to the processing of personal data, is all about ensuring that an organisation has the capability to draw a clear and unbroken line between what they say they'll do with data and what actually happens to it.
That's why simply copying a Privacy Statement either from a boiler plate template, from your old website, or from a website that has one that you think is cool is a risky undertaking. You need to invest the time and effort into your public statement of your goals, intent, controls, and governance of a mission critical asset otherwise you'll risk a potentially damaging disconnect between what you say and what you actually do. That is as bad as, or possibly worse then, NOT having a privacy statement.
- Not having one shows you didn't think about your duties
- Having one that doesn't actually match what is actually happening with the information shows you care, but just not that much.
Ultimately, the objective of the Privacy Statement is to redress the balance between Data Controller and Data Subject by requiring the Controller to share some information in order to get some.
For that reason it is not a static document that you write once and set aside. It needs to be kept under regular review, particularly when you are changing systems or processes which will affect the nature and extent of your processing of personal data.
What you say you should must match what you actually do or your Privacy Statement will not be worth the ether it is written on.