Google’s March 2024 core update is shaping up to be one of the most discussed SEO developments in recent years. This update has garnered significant attention due to its prolonged rollout, the phasing out of the Helpful Content Update (HCU), and noticeable quality issues on search engine results pages (SERPs), particularly affecting sites like Reddit.

Understanding the Complexity of the Update

Analyzing the March 2024 core update presents unique challenges. The integration—or lack thereof—of the HCU into this core update adds complexity. Unlike traditional updates, this one features a lengthy rollout, making it harder to analyze the impact compared to standard updates.

For instance, the metric commonly used to gauge “peak volatility” is often less revealing for understanding the effects of an algorithm update. In this case, peak volatility during the March 2024 core update was actually lower than what was recorded during the November 2023 core update. This suggests that a single “peak” moment doesn’t fully capture the nuances of this update, which involved a continuous series of fluctuations over 45 days rather than isolated bursts of activity.

Similarly, volatility change metrics—which compare rank fluctuations during calm periods with those during updates—show that both the March 2024 and November 2023 core updates had similar levels of relative change. This metric, though useful, may not fully reflect the March 2024 update’s broad, ongoing nature.

Observing Changes in SERP Rankings

An analysis of around 300 SERPs revealed notable movements at the lower end of page one. While the top results exhibited less volatility compared to previous updates, there were still significant ranking changes. For example, the percentage of URLs that moved from outside the top 20 to the top 10 increased from 6.46% in November 2023 to 9.38% in March 2024. This suggests a shift in rankings throughout the update, indicating that Google may have been recognizing and rewarding previously overlooked content.

However, the impact on the top 5 results was minimal, implying that the update did not disproportionately affect the very top positions compared to other core updates. Instead, the March 2024 update had a more pronounced effect on positions 6-10, highlighting its broad impact.

The Limitations of Aggregate Data

High-level analysis alone does not fully capture the update’s impact. The broad data can be skewed by including both sites with significant changes and those with minimal fluctuations. To understand the full effect, a deeper, qualitative analysis of specific sites is needed.

For instance, some sites that saw growth following the September 2023 HCU experienced significant setbacks with the March 2024 update. Conversely, not all sites were negatively affected—some saw improvements, particularly those with strong informational content.

The Role of the HCU and Future Implications

The relationship between the September 2023 HCU and the March 2024 core update suggests that Google might not have discarded the HCU but rather integrated its principles into a more comprehensive approach for evaluating content helpfulness. This evolution in Google’s algorithms indicates a continued focus on content quality.

Assessing the magnitude of the March 2024 core update is inherently complex. While it appears more impactful than a typical update in its reach and effects, its unique nature—characterized by increased negative impacts on some sites and heightened rank volatility—makes it a significant update in the SEO landscape.