---
title: "Google documents its EEA-only aggregator and supplier units"
url: https://seomadman.com/news/search-central-eea-aggregator-features
section: news
published: 2026-09-12T00:00:00.000Z
modified: 2026-09-12T00:00:00.000Z
author: Adam Hafez
topics: ["Structured data", "Technical SEO"]
---

# Google documents its EEA-only aggregator and supplier units

## The short answer

Google's Search Central changelog logged one entry for September 2026, dated 8 September: new documentation for regional search features called aggregator units, supplier units and structured data carousels. Aggregator and supplier units are EEA-only and cover hotels, flights, ground transportation and products. Carousels also run in South Africa and Turkiye and require structured data markup to qualify.

## Key takeaways

- The September 2026 Search Central changelog contains exactly one entry, published 8 September, documenting regional search features.
- Aggregator units and supplier units appear only in the European Economic Area, across hotel, flight, ground transportation and product queries.
- Structured data carousels run in the EEA, South Africa and Turkiye, with the query types varying by region.
- Google states a site must implement structured data markup to be eligible for a carousel; the page does not list which schema types satisfy that requirement.
- Neither aggregator nor supplier units carry a published eligibility list beyond appearing exclusively inside the EEA.

The September 2026 Search Central changelog has one entry. Dated 8 September, it adds
documentation for three region-specific search result formats: aggregator units, supplier units
and structured data carousels. None of them are new to Google Search; what changed is that Google
now writes down where each one appears and what a page needs to show up in one.

## What the three formats are

**Aggregator unit.** Google's own description: "a unit that provides visibility for ecosystem
participants (aggregators) on the search results page." It appears only inside the European
Economic Area, on hotel, flight, ground transportation and product queries.

**Supplier unit.** The counterpart aimed at direct suppliers rather than aggregators, using the
same wording pattern: "a unit that provides visibility for ecosystem participants (direct
suppliers) on the search results page." Same region, same four query types.

**Structured data carousel.** Google calls it "a list-like rich result that people can scroll
horizontally to see entities from a given site," also known as a host carousel. This one has the
widest reach: the EEA (hotels, local businesses, things to do, products, ground transportation,
flights, vacation rentals), South Africa (hotels, things to do, flights, products, food delivery,
car hire, vacation rentals, ground transportation) and Turkiye (hotels, local businesses, vacation
rentals).

## What the documentation does not say

Google states that a carousel requires structured data markup, without naming which schema types
satisfy the requirement on this particular page; it links out to the general
[carousel documentation](/topics/structured-data) instead of listing types inline. Aggregator and
supplier units carry no published eligibility criteria at all beyond the EEA-only scope. For a
publisher or aggregator trying to qualify, the practical next step is the linked carousel
reference and existing [Merchant Center](/topics/technical-seo) or travel structured data guides,
not this changelog entry by itself.

## Why we care

This is a documentation update, not an algorithm change, and Google's own changelog treats it that
way: no ranking signal, no new markup requirement, no rollout date attached. The reason it matters
regardless is regulatory geography. Aggregator and supplier units exist because the EEA's Digital
Markets Act pushes Google toward giving third-party aggregators comparable visibility to Google's
own verticals, and a site operating in Europe, South Africa or Turkiye now has a citable Google
source describing exactly which query types and regions those formats touch, something that
previously lived only in scattered support threads and observation.

## Frequently asked questions

### What is an aggregator unit?

Google describes it as "a unit that provides visibility for ecosystem participants (aggregators) on the search results page," shown only in the European Economic Area for hotel, flight, ground transportation and product queries.

### Is this new functionality or new documentation?

The changelog entry is documentation, not a feature launch. Google is documenting result formats and eligibility criteria that were not previously written up on Search Central, not announcing something newly built.

### Do these formats apply outside the EEA?

Aggregator and supplier units are EEA-only. Carousels run in the EEA plus South Africa and Turkiye, with the specific query types differing by region.

## Sources

1. [Search Central changelog: Added documentation about regional differences in Search experience](https://developers.google.com/search/updates) - Google Search Central (primary)
2. [Regional differences in Search experience](https://developers.google.com/search/docs/appearance/aggregator-features) - Google Search Central (primary)