Cookies: The Hidden Tech That Keeps the Internet Running

Do you want to understand what cookies are?
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In this short class, we will take a technical look at browser cookies and try to understand what they really are and why the internet as we know it today cannot work without cookies.

We will also go a bit into the privacy concerns around cookies, and I will show you a way to get rid of all these cookie popups without impacting your privacy.

⭐️ Video contents ⭐️

⌨️ 00:00 - Lesson 1: Introduction
⌨️ 00:24 - Lesson 2: The need for personalization
⌨️ 02:17 - Lesson 3: When were cookies invented?
⌨️ 03:35 - Lesson 4: Why are cookies called "COOKIES"?
⌨️ 04:14 - Lesson 5: How cookies work
⌨️ 06:17 - Lesson 6: Functional cookies
⌨️ 07:30 - Lesson 7: Cookies as a privacy issue
⌨️ 08:51 - Lesson 8: How does a tracking pixel work?
⌨️ 10:08 - Lesson 9: User identification and tracking with cookies
⌨️ 13:04 - Lesson 10: The end of 3rd party cookies
⌨️ 14:47 - Lesson 11: Browser fingerprinting
⌨️ 15:30 - Lesson 12: Getting rid of cookie banners
⌨️ 16:49 - Lesson 13: Conclusion

⭐️ Assignment 1 ⭐️

The purpose of this assignment is to understand how cookies are being handled by your browser. The examples are using Google Chrome.

Getting Started - Watch the explanation given in Lesson 6.

Tools needed - Google Chrome browser.

Step 1: Open the Developer Tools in your browser.

Step 3: Inspect the first request being sent. Notice the Set-Cookie header in the HTTP response.

Step 4: Reload the page and inspect the second request being sent. Notice the Cookie header in the HTTP request.

Step 5: Make two screenshots of your browser Developer Tools showing the Set-Cookie and Cookie header.

Step 6: Delete the cookie using the Developer Tools.

⭐️ Assignment 2 ⭐️

The purpose of this assignment is to understand how a tracking pixel works.

Getting Started - Watch the explanation given in Lesson 8.

Step 1: Open the Developer Tools in your browser.

Step 5: Inspect the request to the tracking website that is being sent in the background.

⭐️ 📩 Contact & Imprint ⭐️

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[Sidharthpatil]

One of the best visual representation overall. Keep it up!🤘

[RB-ustf]

This is hands down the best video about cookies on the internet. I absolutely love how it goes into details and actually shows in developer tools how this works. I really love how it removes all ambiugity and does not assume that the viewer knows anything. This is just sooo good!

[TechChefMM]

Excellent! Thank you! Now looking for deep dive info on Authentication cookies.

[freshrace]

You are explaining everything in a very simple manner and visualization is great. Thank you! What browser do you use daily? Is it Brave?

[sergioriverarocha]

Great video! I'm surprised this isn't on the top results when searching for what cookies are, I loved your video!

[ferial]

Thank you valentin.. I hope I saw this video back when I was a student.. cookies seemed like a difficult concept.. it is very clear now after your explanation.

[АнтонГородец-дк]

Thanks! Glad to see... Hear you again)

[usefdoybenz]

Valentin, first thanks for your great videos and udemy course, do you also have some course or video about how to work with the dev chrome tool or any other similar? thanks !!!

[ReviewSutras]

Things are working in safari, but not in chrome.