Core Update Hits Aggregators

Google’s March core update has led to noticeable shifts in search visibility, with early data suggesting that aggregator platforms and user-generated content sites have lost ground, while first-party and authoritative sources have gained. Although Google has not confirmed the exact changes behind the update, the patterns emerging across multiple industries provide useful insight into how search rankings may be evolving.

The analysis, carried out by Amsive, reviewed over 2,000 domains using SISTRIX Visibility Index data. It compared performance between 27 March, when the update began rolling out, and 8 April, when it was completed. While visibility scores do not directly reflect traffic, they are widely used to track changes in search presence and can highlight broader ranking trends during core updates.

One of the most consistent findings from the data is a shift away from platforms that aggregate or host third-party content. This includes websites that rely heavily on listings, reviews, or user-generated contributions. In contrast, sites that produce original content or represent official sources appear to have benefited.

This pattern suggests that Google may be placing greater emphasis on content ownership and authority. Rather than favouring platforms where users discuss or compile information, the update appears to reward the original source of that information.

Among the most notable changes was a significant drop in visibility for YouTube. According to the data, it recorded the largest decline of any domain analysed during the update period. However, this drop came after a sharp increase earlier in the month, meaning its visibility has largely returned to previous levels rather than falling to a new low.

Other major platforms also experienced declines. Reddit, Instagram, and X all saw reductions in visibility during the rollout. These platforms are heavily driven by user-generated content, which aligns with the broader trend identified in the analysis.

However, it is important to note that some of these platforms began to recover shortly after the update completed. For example, Reddit and Indeed both saw a rebound in visibility, indicating that initial losses during a rollout do not always represent long-term outcomes.

When looking at specific sectors, the same trend becomes more apparent. In the travel industry, aggregator sites such as online travel agencies and review platforms lost visibility, while hotel chains and official travel providers gained. This suggests that Google may be prioritising sources where users can directly complete actions, such as booking accommodation.

A similar pattern can be seen in the jobs and education sector. Job board platforms saw declines, while employer career pages and government job sites improved their visibility. This again points towards a preference for first-party sources that offer direct access to opportunities rather than aggregated listings.

The health sector showed more mixed results, but the general direction still leaned towards authoritative sources. Government health websites and recognised institutions gained visibility, while some well-known health publishers saw declines. This could indicate a stronger focus on trust and credibility, particularly for sensitive topics.

These patterns are not entirely isolated. Other recent studies have reached similar conclusions, suggesting that websites offering direct services or enabling users to complete tasks are performing better in search results. This aligns with the idea that Google is focusing more on usefulness and practical value.

At the same time, it is important to approach these findings with caution. Core updates are complex, and Google rarely provides detailed explanations about what has changed. Visibility data offers a snapshot of performance during a specific window, but it does not capture the full picture.

Additionally, rankings can be volatile during rollout periods. Some sites may experience temporary drops or gains before settling into more stable positions. This is why it is important to monitor trends over time rather than drawing conclusions from short-term fluctuations.

Despite these limitations, the consistency of the pattern across multiple industries is difficult to ignore. Across travel, jobs, health, and other sectors, aggregator and user-generated platforms have generally lost visibility, while original content creators and official sources have gained.

For businesses and website owners, this shift highlights the importance of providing unique, high-quality content that offers clear value to users. Relying solely on aggregated information or user contributions may not be enough to maintain strong visibility in search results.

It also reinforces the ongoing role of authority and trust. Websites that can demonstrate expertise, provide accurate information, and offer direct value to users are more likely to perform well, particularly as Google continues to refine its algorithms.

In practical terms, this may mean focusing more on first-party content, improving the depth and quality of information, and ensuring that users can take meaningful actions directly on the site. These factors appear to be becoming increasingly important in the current search landscape.

Looking ahead, it remains to be seen how these changes will develop over time. Google has not released detailed guidance on the March core update, and further adjustments may still occur as rankings stabilise.

However, the direction is becoming clearer. Search is moving towards prioritising original, authoritative content over aggregated or repurposed material. For those working in SEO and digital marketing, adapting to this shift will be key to maintaining visibility in the months ahead.