Cookie Policy Explained: What It Is, Why You Need One, and What to Include

What Is a Cookie Policy?

A cookie policy is a document that tells visitors what cookies your website uses, why they are used, and how visitors can control them. While a privacy policy covers all personal data collection and processing, a cookie policy specifically focuses on cookies and similar tracking technologies like web beacons, pixels, and local storage. Some businesses include cookie information within their privacy policy, while others maintain it as a separate document. Either approach can work, but a dedicated cookie policy makes the information easier for users to find and understand.

What Are Cookies, Exactly?

Cookies are small text files that websites store on a visitor's browser. They serve many purposes, and understanding the different types helps you explain them accurately in your policy.

Types by Purpose

• Strictly necessary cookies: These are essential for the website to function. They handle things like session management, shopping cart contents, security tokens, and load balancing. You generally do not need consent for these.
• Performance/analytics cookies: These collect data about how visitors use your website, such as which pages are visited most, how long visitors stay, and what errors they encounter. Google Analytics is the most common example.
• Functionality cookies: These remember user preferences like language settings, region, or display preferences. They improve the user experience but are not strictly necessary.
• Targeting/advertising cookies: These track visitors across websites to build a profile of interests and show relevant advertisements. They are typically set by third-party advertising networks.

Types by Duration

• Session cookies: Deleted when the browser closes. Used for things like keeping users logged in during a single visit.
• Persistent cookies: Remain on the device for a set period (days, months, or even years). Used for remembering login credentials, preferences, or tracking behavior over time.

First-Party vs Third-Party

• First-party cookies: Set by your website directly. You have full control over these.
• Third-party cookies: Set by external services embedded on your site (analytics tools, ad networks, social media widgets). You have less control over these and must disclose their use.

Legal Requirements

The ePrivacy Directive (EU Cookie Law)

The ePrivacy Directive (2002/58/EC, amended in 2009) is the primary EU law governing cookies. It requires that you provide clear and comprehensive information about any cookies you use, and obtain the user's consent before setting any cookies except strictly necessary ones. Each EU member state has implemented this directive slightly differently, but the core requirement is the same: informed, prior consent for non-essential cookies.

GDPR and Cookies

The GDPR reinforces the ePrivacy Directive's consent requirements by setting a high standard for what constitutes valid consent. Under GDPR, consent must be freely given (no cookie walls that block all content), specific (per-purpose, not blanket consent), informed (clear explanation of what each cookie does), and given through a clear affirmative action (no pre-checked boxes). You also need a lawful basis under GDPR for processing any personal data collected through cookies. Building a GDPR-compliant cookie policy requires addressing both the ePrivacy Directive and GDPR requirements.

CCPA and Cookies

The CCPA does not specifically regulate cookies, but if your cookies collect personal information that is "sold" or "shared" with third parties (as is common with advertising cookies), you must disclose this and provide opt-out rights. Advertising cookies from networks like Google Ads often constitute "sharing" of personal information under CCPA.

PECR (UK)

The UK's Privacy and Electronic Communications Regulations mirror the ePrivacy Directive and work alongside the UK GDPR. The requirements are essentially the same: inform and obtain consent before setting non-essential cookies.

What Your Cookie Policy Should Include

A thorough cookie policy should contain the following sections:

• Introduction: Explain what cookies are in plain language.
• Cookie inventory: List all cookies your site uses, organized by category. For each cookie, state its name, purpose, provider (first-party or third-party), type (session or persistent), and expiration period.
• Legal basis: Explain the legal basis for each category (consent for non-essential cookies, legitimate interest for strictly necessary ones).
• How to manage cookies: Provide instructions for controlling cookies through browser settings and through your cookie consent mechanism. Include links to browser-specific instructions for Chrome, Firefox, Safari, and Edge.
• Third-party cookies: Identify each third-party service that sets cookies on your site and link to their privacy policies.
• Consequences of disabling cookies: Explain what functionality users might lose if they reject non-essential cookies.
• Updates: State how and when you will update the policy and how users will be informed of changes.
• Contact information: Provide a way for users to ask questions about your cookie practices.

Implementing a Cookie Consent Banner

The consent banner is how most websites collect cookie consent. Here are the requirements for a compliant banner:

• It must appear before any non-essential cookies are set (not after).
• It must offer a genuine choice (an "Accept" button and a "Reject" or "Manage preferences" option that is equally prominent).
• It must not use deceptive design patterns (dark patterns) like hiding the reject option or making it harder to decline than to accept.
• It should link to your full cookie policy for more information.
• It must store the user's consent choice and not ask again until the consent expires or you add new cookie categories.
• It must allow users to withdraw consent as easily as they gave it.

For e-commerce sites, cookie compliance is especially important because these sites typically use multiple third-party cookies for analytics, advertising, and payment processing.

Common Mistakes

• Setting cookies before consent: Many websites load analytics and advertising scripts before the user interacts with the cookie banner. This violates the ePrivacy Directive and GDPR.
• Treating "closing the banner" as consent: Consent requires an affirmative action. Ignoring a banner is not consent.
• No way to withdraw consent: If users accept cookies, they must be able to change their mind later, typically through a persistent settings link in the footer.
• Outdated cookie lists: Adding new tools or scripts without updating your cookie policy creates a gap between your disclosures and your actual practices.

This article is for informational purposes only and does not constitute legal advice.