What Are Cookies?

Last updated on 17 May 2023 license from : privacypolicies 

Cookies, in their simplest form, are little clusters of data. A web server

passes these data clusters through to your computer after you've landed

on a website. Your computer then stores the data as files inside your 

browser cache. It's less complicated than it sounds. If you've ever 

wondered how websites remember your login details, or how items in 

your online shopping cart stay there while you shop, it's not magic. It's

actually all down to tiny strands of data called cookies. This article will 

look at what types of cookies there are, why you would want to use 

them, what laws dictate their use and how you can delete them from 

your devices.

An Introduction to Cookies

There are many types of cookies, including cookies that:

    - Save your password(s) so you don't need to remember them 

        whenever you visit websites

    - Remember what sites you've visited in the past so you can 

        view your browser history

    - Keep track of your shopping cart as you browse an online store

    - Show you targeted ads based on your browsing behavior

    - Verify user login details

We'll look at consent later, but for now, just bear in mind that most 

websites use cookies and it's important that they tell you so. 

They should alert you to cookie usage as soon as you land on 

the website, and it should be clear where you can find further 

information about their Cookie Policy. Remember - you have the 

right to control what data you share with retailers, companies, 

and other third parties, and what cookies they install in your

browser. Some pieces of legislation, like the EU's ePrivacy Directive, 

give you very specific rights over personal data sharing through 

cookies - more on all this below. For now, let's turn to something 

simple. Where did we get the idea for cookies from, and what's 

their main job? It actually hasn't changed much since they were 

invented back in 1994. The inventor, Lou Montulli, created cookies 

to solve two problems:

    - The difficulty in tracking whether users visited websites more 

        than once, and

    - The lack of technology that made it impossible to launch 

        ecommerce stores

The idea of "tracking" is still central to why websites use cookies 

now, although there are now many types of cookies and a whole 

host of ways they can be used. We'll go over these in more detail 

shortly, but for now here are two things to bear in mind.

Some cookies are absolutely necessary. For example, if you're 

shopping online, you couldn't purchase anything unless you could 

save items in your virtual cart. You'd lose the item as soon as you 

moved to the "checkout" page. So, in some cases, cookies are 

essential to a website's functionality. If the website won't work 

without certain cookies, the owner should make this clear. 

Sports apparel retailer, Gymshark, explains that the shopping cart 

won't work unless you accept certain cookies:

Secondly, cookies, for the most part, can't and don't transfer malware 

or other malicious programs onto your device. It's typically safe to 

accept cookies, but there are times when you might want to reject 

them - we'll look at this later. With all that in mind, what are the 

advantages and disadvantages of using cookies, and why 

should you care about them? Let's briefly take a look.

Advantages of Cookies

There are a number of advantages to using cookies, but here are a 

few that stand out:

They remember your preferences, so you'll only typically see ads 

that are relevant to you they save your passwords and usernames 

so there's no need for you to remember these details when you log 

onto different websites once you know where to find them, they're 

easy to delete and control - more on that below Cookies remember 

your browsing behavior, so you'll often see search results that are 

most relevant to you when you're using Google or other search engines.

What, though, are the disadvantages?

Disadvantages of Cookies

Just like there are advantages to accepting cookies, there are also a

 few drawbacks. The main ones you should be aware of are:

    - It's sometimes possible for third parties to access information 

        stored by cookies, which raises obvious privacy concerns

    - You may feel like someone is watching you as you're browsing 

        the internet, which understandably makes some feel uncomfortable

    - If you don't know where to look, it can be difficult to find cookies and 

        delete them

    - Some viruses may be disguised as cookies, and in other cases, 

        cookies recreate themselves after they've been deleted - these 

        are colloquially known as "zombie" cookies

What's important is that you understand how cookies actually work 

and how you can take control of your internet privacy. Without 

getting too technical, let's be clear on what cookies are, what types 

of cookies are out there, and how each type of cookie gathers 

various bits of information about you, your computer, and your 

browsing history.

How do Cookies Work?

A web server passes the data clusters known as cookies onto 

a mobile device. It's then stored as a file inside your browser cache. 

It's less complicated than it sounds, so to illustrate, here's how it works:

    - You visit a website

    - The web server passes a short message along to your web browser

    - The browser saves this message in a file titled something like "cookie.txt"

    - You click on another website page (for example, a shop category)

    - Your browser sends a short message "back" to the server 

        that reveals a little more about what you're looking at

Let's look at an example. Say you visit the popular healthcare 

website, NetDoctor. Once you land on the homepage, a box pops up 

that tells you about the website's Cookie Policy:

If you click off this box and browse the website, it'll install cookies 

on your browser, and your browser sends a message back about 

what you're on looking at - for example, cold remedies.

If you're still a little confused, think of this whole process like a 

text message exchange between two parties - the server, and 

your browser. Now we're clear on how cookies end up in your device, 

let's talk about what types of cookies you'll encounter and 

what they're used for.

Types of Cookies

Broadly, there are six major types of internet cookies out there:

    - Session cookies

    - Persistent cookies

    - Third-party cookies

    - First-party cookies

    - Marketing cookies

    - Performance and analytical cookies

Let's look at each type of cookie in turn and see what they're used for.

Session Cookies

Session cookies are temporary. They literally only last for a "session." 

Once you close the browser window, or leave the website, the cookie 

disappears. Unlike other cookies, session cookies are never stored 

on your computer. Session 

cookies allow you to:

• Use your shopping cart on ecommerce websites
• Browse websites without constantly re-entering the same 

information Here's how UK car dealership, Arnold Clark, 

describes session cookies in its Privacy Policy:

Persistent Cookies

Persistent cookies are a little different. These cookies do stay on 

your computer once you've closed the browser. They're designed 

to remember your preferences for a specific period of time, 

whether it's your login details, your shopping wishlist, or your 

recently viewed items. Gymshark describes persistent cookies 

as temporary but beneficial because they help make the 

shopping experience easier:

Third-party Cookies

These cookies are slowly going out of fashion, but you should still 

know about them. They allow third parties to check how well their 

ads are performing on other websites. Basically, if you click on 

an ad for a product from Company A while you're browsing Company

B's website, you'll get a cookie on your computer from Company A. 

Since these cookies raise potential privacy concerns, they're far 

less popular than before, and platforms like Google are

cracking down on them.

First-party Cookies

First-party cookies shouldn't be confused with third-party cookies. 

These cookies improve the overall functionality of a website and 

they're set by the website owner. Unlike session cookies which 

disappear right after your session, these cookies stay on your 

device so it's easier for you to use the website the next time 

around. Here's how a fitness retailer, Fitness Superstore, 

describes these functionality cookies. You'll note that these 

cookies are strictly confined to the one website i.e. they 

can't track your browser behavior or which other 

websites you visit:

Marketing Cookies

Marketing cookies are similar to third-party cookies, but they're 

less invasive. They're primarily used to show you ads that are 

relevant to you which improves your experience while you're 

browsing the internet. That's exactly how Gymshark describes 

marketing cookies in its Cookie Policy:

Performance and Analytical Cookies

These cookies help a company assess their website's overall 

performance and usability. In other words, they can track:

• How long people spend on the website
• Whether people find the information they're looking for
• If people are ignoring certain parts of the website, or if 

        there's unusually high activity in other parts

Arnold Clark sums this up nicely. As the company notes, these 

cookies are all about improving how the website actually works 

so it's easier for future customers to navigate:

So, now we're clear on what cookies do, you probably have 

another question: 

Do you have to accept all these cookies, even if you don't want to? 

The answer is no. Here's why.

What the Law Says About Cookies

Thanks to international privacy laws including the EU's General Data 

Protection Regulations (GDPR) and the ePrivacy Directive, 

websites must do two things before they can install cookies in 

your browser or device:

• Tell you about the cookies they use
• Get your consent to using these cookies

Why do they need to get your consent? It comes down to the 

type of information that cookies can gather. Cookies can collect 

what's known as "personal data" or " personal information." 

Personal data is, broadly speaking, any information that can 

be used to identify you or your household. Examples include:

• Name
• IP address
• Email address
• Financial details
• Login details

Global privacy laws allow consumers to:

• Restrict who has access to personal information
• Revoke consent to a company holding your personal 

        data at any time

• Refuse to accept marketing and other unnecessary 

        cookies that collect personally identifiable information

Most importantly, if a company wants to use cookies, 

consumers have the right to know:

• Why they're using cookies
• Specifically what type of information they plan on collecting
• How they use the data, and who they share it with
• How to revoke consent
• How to delete cookies

Companies should set out these rights in what's called a Cookie Policy. 

You'll either find this inside the Privacy Policy, or it'll be a 

separately- linked document. Commonly, you'll find the Policy 

linked at the bottom of the website in the footer. Here's an 

example from Gymshark showing separate Privacy Notice and Cookie 

Policy links:

When you access the Cookie Policy, you can see how the company 

uses cookies and why, along with other relevant information:

The only exception to the rule of consent is if the cookie is "strictly 

necessary" for the website's functionality - for example, session 

cookies. If you don't want to accept strictly necessary cookies, 

that's fine, of course, but you won't be able to use that website.

How Websites Obtain Consent

The most common method for obtaining consent to use cookies is via 

Cookie Notices, or popups. The notice will tell you that the website 

uses cookies, and it should give you the option to view the 

different cookies before you proceed. Here's an example 

from the BBC:

If you click "no" you'll go straight to the Cookie Policy where you can 

set your specific preferences. You'll note that strictly necessary cookies 

are turned on by default:

If you decide to delete cookies stored on your device or browser, here's

what to do.

How to Delete Cookies

We'll show you step by step how to delete cookies from some of the 

most popular, commonly-used browsers.

How to Delete Cookies on Google Chrome for Windows

1. From the main menu, click the three-dot menu and select Settings:



2. In the Privacy and security section, click Clear browsing data:



3. In the Clear browsing data window, click the Advanced tab. 

        Choose the time period you wish to clear cookies from and 

        click Clear data:

How to Delete Cookies in Firefox (Mozilla) for Windows

1. From the main toolbar, click Options:



2. In the left sidebar, click on Privacy & Security:



3. Under Cookies and Site Data, click Clear Data:

For further assistance, visit the Mozilla help page here.

How to Delete Cookies on Opera for Windows

1. In the Tools sidebar, click on Settings:



2. In the left sidebar, click Advanced, and then Privacy & security:



3. Under Privacy and security, click the arrow next to 

        Clear browsing data:

1. Go to the Advanced tab, choose your parameters and 

        click Clear data:

For further assistance, visit the Opera security and privacy page here.

How to Delete Cookies on Edge Browser for Windows

1. In the browser's main menu, click Settings:



2. In the Settings menu, click Privacy and services:



3. Under the Clear browsing data section, click 

        Choose what to clear:

1. Select which time range you'd like to clear data from and click 

        on Clear now:

Conclusion

For websites to work properly, they rely on cookies. 

Cookies are small files containing computer code that can 

sometimes identify you, your preferences, and your 

browsing behavior. There are many types of cookies, and 

they collect different types of data. However, because 

cookies can collect information that is used to personally

 identify you, websites need your permission before they 

install them on your device or browser. The only exception 

is when a cookie is strictly necessary i.e. if it's the only way 

to keep products in your shopping cart. This type of 

information isn't strictly personal because it can't 

technically identify you. You can delete cookies at 

any time by clicking through the menu options in 

your browser, and you can always contact retailers 

or websites individually to ask them to delete your 

personal information. Put simply, you're always in control 

of what happens to your personal data and who has access 

to it. Only consent to marketing and analytics cookies if you're 

comfortable sharing this type of information, and remember, 

you're free to change your mind at any time.