> ## Content Index
> Fetch the complete content index at: https://www.adlingo.org/llms.txt
> Use this file to discover other available public pages before exploring further.

# FLEDGE (First Locally-Executed Decision over Groups Experiment)
- URL: https://www.adlingo.org/glossary/fledge/
- Published: 2025-01-15T11:00:00.000Z
- Updated: 2025-01-15T11:00:00.000Z
- Description: Part of Google's Privacy Sandbox, a proposal for interest-based advertising that keeps user data local to the browser.
- Author: Travis Lusk
- Tags: Google & Regulation, #glossary, #Import 2026-10-27 17:05

Google's proposal for interest-based targeting after third-party cookies. The user's browser holds the interest group data locally. The auction runs in a sandboxed environment on the device. Publishers and advertisers get outcome signals without accessing individual browsing history. FLEDGE was later renamed Protected Audience, and Google retired Protected Audience along with most of the Privacy Sandbox in October 2025\. Understanding the design still helps make sense of the problem it was trying to solve.