They answer different questions
A privacy policy explains the broader processing of personal data: who controls the data, why it is processed, which legal bases apply, who receives it, how long it is kept, whether transfers happen, and what rights people have.
A cookie policy is more operational. It explains technologies placed on or read from the user's device, such as cookies, pixels, local storage, SDK identifiers, or similar tracking tools. It should describe categories, purposes, duration, and vendors in a way that matches what the website actually loads.
The banner must match the documents
Cookie banners describe user choices at the point of collection. Privacy and cookie policies explain the surrounding legal and operational context. If the banner says analytics are optional but the policy says analytics are always collected, the user experience becomes inconsistent.
The same problem appears when a banner lists three categories but the policy lists five, or when a vendor appears in the tag manager but nowhere in the legal documents. A good review tests the live website, not only the written text.
Necessary cookies need a narrow definition
Strictly necessary technologies usually support functions the user asked for, such as login sessions, security, load balancing, shopping carts, language choices, or consent storage. They should not become a hiding place for analytics, advertising, or broad product measurement.
Where cookies or similar technologies process personal data, GDPR transparency still matters. The cookie layer and the privacy layer should therefore agree on purposes, legal bases, recipients, retention, and transfer context.
Consent should be reflected technically
If a website asks for consent before loading analytics or marketing tools, the technical implementation should honor that choice. Tags should not fire before the choice is made, and withdrawal should stop future non-essential tracking where applicable.
This is where many SaaS sites drift. A new marketing page may include a script outside the consent manager, or an A/B testing tool may be added by a tag manager without updating the banner. Regular scans help catch the difference between promised behavior and loaded behavior.
Keep cookie tables useful
Cookie tables are most helpful when they are specific enough to support user understanding. Name, provider, category, purpose, duration, and whether the technology is first-party or third-party are more useful than a generic paragraph about improving the website.
The table should also be maintainable. If every minor technical cookie is listed manually, it may become stale quickly. If only broad categories are listed, users may not understand what is happening. The right level depends on the product, the tools used, and the consent experience.