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What You Need To Know About Browser Cookies

Browser cookies aren’t that complicated, but there is the potential for security threats.
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Browser Cookies

If you use a browser on your smartphone or computer, chances are you’ve encountered cookies pretty regularly. Computer cookies are something that we are all familiar with seeing pop up on various sites, but many people don’t understand what cookies truly are and what their purpose is. 

In this guide, we’ll break down exactly what cookies are, how they work, and their pros and cons.

What is a Cookie?

Baked cookies are fantastic, but what about the other sort of cookie? Most internet browsing experiences would be incomplete without the use of digital cookies. A computer cookie is otherwise known as an HTTP cookie, web cookie, internet cookie, or browser cookie, although all of these terms relate to the same thing: a method of tracking your online activity.

When you visit a website, your web server sends a little piece of data called a computer cookie to your device's browser. This cookie is used to keep track of information about you, such as your website visits and activities. It's critical to understand how these cookies function and when you'll need to intervene to control how your browser caches these data packets.

How Do Cookies Work?

Computer cookies are tiny files that online servers transmit to browsers, frequently containing unique identifiers. Each time your browser requests a new page, these cookies might be transmitted back to the server. It's a technique for a website to remember who you are, what you like, and how you use the internet.

Websites utilize cookies to make the end user’s browsing experience more simple and efficient. After leaving a site without cookies, a user would have to log in again or rebuild their shopping carts from scratch, as opposed to all of that information being maintained for them. Cookies have evolved into a necessary part of the internet experience.

Because of this, you'll want to know why they're important to preserve and when they're simply not worth it.

The following is how cookies are supposed to be used:

Management of a session

     Cookies allow websites to recognize users and remember their unique login information and interests, such as sports news vs. politics.


     The most common method cookies are used to tailor your experiences through customized advertising. 


     Cookies are used by shopping sites to monitor what things users have previously looked at, allowing them to offer suggestions for additional items they might like and      store items in shopping carts while they do their shopping.

While this is mostly for the advantage of the end user, web developers can also profit greatly from this setup. Cookies are little files that are saved locally on your device to free up space on a website's servers. As a result, websites may become more personalized while also saving money on server upkeep and storage.

Advantages of Cookies


Lots of companies utilize cookies to target products to consumers. For their marketing efforts, they collect information such as search terms, keywords, and geographic regions. Cookies are used by social networking sites like Facebook to provide relevant advertisements.


Cookies can also be customized to meet specific needs. It can, for example, be programmed to expire when the user closes the browser tab or to exist just for a defined amount of time.

Server Requirement

Without the usage of server resources, all cookie-related data is saved on the hard disk. The server is not subjected to any additional stress or weight. As a result, they are under less stress, making cookie implementation easier.


Cookies are highly convenient for users. The customer has the option of doing anything they want with cookies. All browsers include options for clearing history, including cookies. Users might manually search for the cookies text files on their hard disk. Users have the option of editing or deleting them.


Cookies can also be configured to last for a longer amount of time. Once the cookies are saved on the user's hard disk, they will remain accessible until the user actively deletes them. Information may be obtained through cookies even if the server crashes.


Cookies can remember information from forms in addition to websites. As a result, the address field will be automatically populated each time the user visits the site. Cookies, on the other hand, will not remember sensitive information such as credit card numbers.

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Disadvantages of Cookies

Limitations on Size

Cookies have their own size restrictions. They are unable to store significant amounts of data. Most cookies can only hold data of up to 4 kilobytes. When it comes to the number of cookies used, browsers also have limitations. All other browsers, with the exception of Internet Explorer, limit you to 20 cookies per website.

Issues with Privacy

Apart from security, users of cookies are also concerned about privacy. When a person browses the internet, cookie-enabled sites record all of the user's online activity. The majority of users are unaware that such data is kept on their hard disk. As a result, any third party, including government organizations and corporations, can access this information.

Disabling Them Can Be Difficult

Cookies can also be turned off in most browsers. Users with a high level of security awareness might just turn them off. If the security level is set too high, certain browsers will automatically deactivate cookies. As a result, without cookies, web apps will not function.

Negative Impact on the Browser

Cookies aren't restricted dependent on how much time you spend on the internet. As a person browses the internet, more and more cookies are gathered. These cookies will remain on the user's hard disk unless they are deleted. The browser gradually slows down or lags as a result of this, causing users to eventually want to “clear cookies” to restore browser efficiency. 

Data Security Issues

Because cookies are saved as text files on the hard disk, they pose a major security concern. These files are simply opened and seen by any intruder. Furthermore, not all websites that gather information using cookies are trustworthy. Some of them may be malicious, attempting to attack your computer through the use of cookies.

Data Encoding

Encrypting and decrypting cookies is a time-consuming procedure that necessitates additional code. The application's performance will be harmed as a result of the time spent encoding.

Types of Cookies

Cookies have been used for a variety of purposes, but they always work in the same way:

Magic Cookies

This is an old-school computer term for data packets that are delivered and received without modification. This is commonly used to access computer database systems, such as a company's internal network. This notion predates the contemporary concept of a "cookie."

HTTP Cookies

These are a modified version of the "magic cookie" designed for online use. We presently utilize the HTTP cookie to administer our online experiences. Some bad persons can use it to track your internet activities and steal your personal information.

Overall, cookies continue to be a common feature of many websites, especially those within the EU that are looking to comply with GDPR. Since this concept doesn’t seem to be going away, it’s a crucial one to understand before clicking “Accept All Cookies” blindly. 

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