Matt

Co-Founder & Engineer

Howdy Friends! You’ve seen the banner on nearly every website you visit — “This site uses cookies.” You click accept and move on. But what are cookies actually? Are they good? Bad? Should you care? Let’s break it down.

A cookie is a small text file that a website saves to your browser. That’s it. There’s nothing exotic about it — it’s just a tiny piece of information stored on your computer or phone.

When you visit a website, the site can ask your browser to store a cookie. The next time you visit, your browser sends that cookie back to the site. This lets the site recognize you.

Think of it like a coat check ticket. The venue gives you a ticket (the cookie) when you arrive. When you come back, you hand them the ticket and they know which coat is yours.

Why Do Websites Use Cookies?

Cookies solve a fundamental problem: the web is stateless. Every page you load is, technically, a brand new request from scratch. Without cookies, websites would have no memory of you from one page to the next.

Here’s what cookies make possible:

Staying logged in — Without cookies, you’d have to log in again on every single page you visit. A session cookie keeps you authenticated as you navigate a site.

Shopping carts — Add something to your cart, click to another page, and it’s still there. That’s a cookie remembering your cart contents.

Preferences and settings — Dark mode, language selection, font size — sites remember your preferences between visits because they stored them in a cookie.

Remembering you — “Remember me on this device” checkboxes write a cookie so you don’t have to log in every time you come back.

These are all examples of functional cookies — cookies that exist to make the website actually work properly for you.

Why Might You Not Want Cookies?

Not all cookies are functional. Some exist purely to track you.

Tracking cookies follow you across multiple websites — not just the one you’re on. An advertiser places a cookie on Site A. When you visit Site B, which uses the same advertiser, they recognize the cookie and know you visited both sites. Over time, they build a detailed profile of your browsing habits.

This is how ads seem to follow you around the internet. You looked at a pair of shoes on one site and suddenly they’re appearing everywhere. That’s tracking cookies at work.

Third-party cookies are the main culprit here. They’re placed not by the site you’re visiting, but by external services embedded in that site — ad networks, social media widgets, analytics tools.

The concern is less “someone knows I visited a website” and more “someone is building a comprehensive profile of everywhere I go online and selling that data.” That data is used for targeted advertising, but it can also be sold to data brokers, used in ways you didn’t expect, or exposed in a breach.

First-Party vs. Third-Party Cookies

It helps to know the difference:

First-party cookies are set by the website you’re actually visiting. These are mostly functional — keeping you logged in, saving your preferences. Generally fine.

Third-party cookies are set by external services on the page — ad networks, trackers, social widgets. These are primarily used for cross-site tracking. Most privacy concerns center here.

Major browsers are phasing out third-party cookie support. Safari and Firefox already block them by default. Chrome has been slower to follow, but the direction is clear — the era of third-party tracking cookies is winding down.

Should You Accept or Decline Cookies?

It depends on the site and the cookie type.

Accepting all cookies is the path of least resistance. Functional cookies work, but you’re also consenting to any tracking the site has set up.

Declining non-essential cookies (where the option is offered) lets the site work normally while opting out of tracking. Most cookie banners with a “Manage preferences” option let you accept functional cookies and reject tracking ones.

Clearing your cookies periodically is a simple privacy habit. It logs you out of sites and wipes tracking cookies. Your browser’s settings make this easy.

Using a privacy-focused browser or extension — browsers like Firefox and Brave block many trackers by default. Extensions like uBlock Origin give you more control.

A Quick Summary

Cookie Type What It Does Should You Worry?
Session cookie Keeps you logged in No
Preference cookie Remembers your settings No
Analytics cookie Tracks usage on one site Low
Third-party tracking cookie Follows you across sites Worth declining

Cookies aren’t inherently bad. The functional ones make the web usable. The tracking ones are worth being thoughtful about. Most of the time, clicking “manage preferences” and declining non-essential cookies is the right move — it takes ten extra seconds and puts you in control of your data.

Have questions about web privacy or how GR Host handles data? Get in touch — happy to help.

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