Sources and studies

Google

• Server-side tagging in Google Tag Manager – overview

• Planning infrastructure and costs for server-side tagging

• Google Tag Gateway for Advertisers

• Consent Mode

• Enhanced conversions in Google Ads

• Privacy Sandbox retirement, Search Engine Land

Shopify

• Pixels and customer events, Shopify Help Center

• Web Pixels API: pixel privacy and Customer Privacy API

• Upgrading the Thank you and Order status pages, Shopify Help Center

• Limitations of the Google & YouTube app with multiple countries and domains, FeedArmy

• TAGGRS Data Layer app for Shopify

Shopware

• Shopware 6.7.12.0 release notes: Enhanced Conversions in the Google Analytics integration and Shopware release news July 2026

• TAGGRS – Server Side Tracking in the Shopware Store

• Google Tag Manager, GA4 & Google Ads incl. server-side tracking by Biloba IT

• EU Cookie Policy Pro by ACRIS

Hosting

• TAGGRS pricing and TAGGRS terms and conditions with plan prices

• Cloudflare integration of the Google Tag Gateway, May 2025

Ad platforms

• Meta: deduplicating pixel and server events

• Microsoft Advertising: Conversions API

• LinkedIn: Conversions API

• OpenAI: documentation on ads, Measurement Pixel and Conversions API

Browsers and privacy technology

• Advanced Fingerprinting Protection in iOS 26, 9to5Mac

• Assessment of Link Tracking Protection in Safari, Improvado

Law and regulation

• Section 25 TDDDG, German implementation of the ePrivacy rules (in German)

• Digital Omnibus: planned changes to cookie consent, Heuking (in German)

• What the Digital Omnibus means for the online industry, onlinemarketingrecht.de (in German)

• Swiss Federal Act on Data Protection (revFADP)

Studies and market data

• Meta Blueprint: Conversions API and Meta Pixel, 13 percent better cost per result on average

• Meta: Pixel and Conversions API updates, April 2026

• Google: enhanced conversions and privacy in ad performance

• Google: data strength updates with figures on Tag Gateway and enhanced conversions

• Baymard Institute: average cart abandonment rate

• Statista: ad blocker use in Germany (in German)

Note on currency

This guide reflects the state of play in November 2026. Platform rules, prices and the legal situation change regularly, and negotiations on the Digital Omnibus are still ongoing. Before making a decision, check technical and legal details against the current primary source. Practical experience comes from arboro's work with Shopware and Shopify stores. This guide is not legal advice.