#Series

Series

First-party data in online advertising, part 2: How to collect it and send it to media systems

2/4/2026

Lenka Pittnerová

Analyst

Complete technical guide to collecting first-party data via dataLayer, normalizing, hashing, and sending through server-side GTM to Google Ads and Meta.

Series

First-Party Data

First-party data in online advertising, part 1: How it works and why it improves campaign performance

23/2/2026

Lenka Pittnerová

Analyst

Learn how first-party data improves campaign performance, measurement accuracy, and cross-device tracking. Discover practical ways to collect and use it.