---
title: "What is Cookies?"
url: https://fibr.ai/glossary/cookies
description: "Learn what cookies are and how they track visits, personalize experiences, and enable retargeting amid growing privacy regulations and browser restrictions."
last_updated: 2026-05-05T11:57:37.581614+00:00
---
Cookies help websites remember preferences, track visits, personalize experiences, and enable analytics and advertising.

They can store login details, cart items, and browsing activity. Marketers use cookies to retarget visitors, attribute conversions, and measure campaign impact. Regulations like GDPR and increasing browser restrictions influence how cookies can be used, which has shifted more focus toward server-side tracking and privacy-safe analytics.

### Explore more Glossary terms


##### Customer Journey Mapping

Customer Journey Mapping visualizes how customers move through stages like awareness, consideration, purchase, onboarding, and loyalty.

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##### Customer Journey Management

Customer Journey Management focuses on designing, monitoring, and improving the end-to-end experience users have with a brand across channels.

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##### Customer Data Platform

A Customer Data Platform (CDP) unifies data from multiple touch-points, such as websites, apps, CRM systems, and support tools into a single, persistent customer profile.

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##### Customer Acquisition Cost (CAC)

Customer Acquisition Cost (CAC) measures how much a business spends to acquire one new customer, including marketing, sales, and sometimes onboarding expenses.

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##### Custom Conversion

A custom conversion is a user-defined goal in analytics or advertising platforms used to measure specific actions that matter to a business.

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##### CUPED

CUPED (Controlled Pre-Experiment Data) is a statistical technique used in experimentation to reduce variance and improve test sensitivity.

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Delaware, USA

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