Cookie Banners and Consent: What Website Owners Should Understand

Almost every website seems to greet visitors with a cookie banner now. Some are clear and respectful. Many are confusing, with a bright "Accept all" button and a tiny gray link to manage choices buried somewhere. Website owners often add one because someone said they had to, without knowing what it actually does.

Here is a plain explanation of cookies, consent and how to approach a banner honestly. Privacy laws vary by location and change over time, so treat this as general guidance and talk with an attorney about your specific obligations.

What cookies are

Cookies are small pieces of data a website stores in a visitor's browser. Similar technologies, such as local storage and tracking pixels, work in comparable ways and are often covered by the same rules.

• First-party cookies are set by your own website.
• Third-party cookies are set by other companies whose content or scripts appear on your site, such as analytics, advertising, embedded videos or social media widgets.

The common categories

• Strictly necessary: needed for the site to work, such as keeping someone signed in, remembering a shopping cart or protecting forms from abuse.
• Preferences: remembering choices like language or region.
• Analytics: measuring how visitors use the site.
• Marketing and advertising: tracking visitors across sites to target or measure ads.

When consent may be required

Requirements depend largely on where your visitors are:

• In the European Union and the United Kingdom, rules generally require consent before setting cookies that are not strictly necessary, including most analytics and advertising cookies.
• In the United States, a growing number of states have privacy laws that give residents rights such as opting out of the sale or sharing of personal information and targeted advertising. Some states require websites to honor browser privacy signals, such as Global Privacy Control.
• Other countries have their own rules.

If your organization serves people across regions or uses advertising technology, get specific legal advice rather than guessing.

How to design an honest banner

• Use clear language. Say what you use cookies for in a sentence or two.
• Give equal weight to accepting and rejecting. If there is an "Accept all" button, offer an equally visible "Reject all" or "Only necessary" option.
• Do not pre-select optional categories. Choices should start off, with people opting in.
• Offer granular choices for people who want them, by category.
• Do not load optional scripts before consent where consent is required. A banner that appears while tracking already runs is decoration, not consent.
• Make it easy to change your mind later, with a link such as "Cookie settings" in the footer.
• Remember the choice so people are not asked on every page.
• Make it accessible. Visitors should be able to read and operate the banner with a keyboard and screen reader, and it should not cover focused content. Our keyboard accessibility test is a quick way to check.

Reduce what needs consent in the first place

The simplest banner is one you barely need. Consider:

• Removing trackers you do not use. Many sites carry old scripts from past campaigns.
• Choosing privacy-friendly analytics configured to avoid unnecessary personal data, which may reduce consent requirements depending on the tool and jurisdiction.
• Using privacy-enhanced or click-to-load embeds for videos and maps, so third-party content loads only when a visitor chooses to play or view it.

Find out what your site actually sets

Open your site in a browser, use the developer tools to view cookies and stored data, and note which domains they come from. Compare that with what your banner and privacy policy say. Mismatches are common, and they are worth fixing.

Your cookie practices should also appear in your privacy policy. Our guide to writing a privacy policy visitors can read covers how to explain them in plain language.

Frequently asked questions

Do I need a cookie banner if I only use necessary cookies?

In many places, strictly necessary cookies do not require consent, though you should still explain them in your privacy policy. Once you add analytics, advertising or certain embeds, the answer may change depending on your visitors' locations.

Does website analytics require consent?

In the European Union and the United Kingdom, most analytics that use cookies or similar identifiers generally require consent. Rules elsewhere vary. Check your analytics tool's privacy settings and get legal advice for your situation.

What is Global Privacy Control?

It is a signal some browsers and extensions send to tell websites the visitor does not want their personal information sold or shared. Some US state laws require businesses to honor it as an opt-out request.