Core Web Vitals: A Game-Changer for SEO Rankings?

5 min read

Do Core Web Vitals Have an Impact on Your Organic Search Rankings? In this piece, we examine the assertion, the supporting evidence, and the final judgment.

Core Web Vitals gauge page experience signals to guarantee an immersive user encounter for search users. However, does this translate into an impact on your organic search rankings? Continue reading to explore whether there exists a correlation between Core Web Vitals and enhanced Google rankings.


The Assertion: Core Web Vitals as a Ranking Factor


What Exactly Are Core Web Vitals?


As per web.dev, Core Web Vitals constitute a subset of Web Vitals applicable to all web pages, recommended for measurement by all website owners, and integrated into all Google tools. Each of these Core Web Vitals embodies a unique aspect of the user experience, offering measurable insights into real-world, user-centric outcomes. These essential metrics encompass:

  1. Largest Contentful Paint (LCP): This metric assesses the loading time of the most substantial image or block of text visible in the viewport.
  2. First Input Delay (FID): FID gauges the response time of the browser when a user interacts with the page, such as clicking a button or tapping on the screen.
  3. Cumulative Layout Shift (CLS): CLS measures visual stability, determining whether significant content shifts occur on-screen while various elements load.


By March 2024, the Core Web Vitals metric known as First Input Delay (FID) will be replaced by Interaction to Next Paint (INP).

INP is a metric designed to evaluate a webpage’s responsiveness to user interactions. It achieves this by monitoring the latency of all user actions, including clicks, taps, and keyboard inputs, that transpire throughout a user’s website visit. The resulting INP value is determined by the most extended interaction observed while disregarding outliers.

Notable distinctions between FID and INP encompass the following: FID primarily measures the duration from the initial user interaction with a page (such as clicks or taps) until the browser can effectively respond to event handlers for that particular interaction. In contrast, INP considers all user interactions and evaluates the webpage’s responsiveness throughout the entire user session, focusing on the most extended interaction recorded.


This metric aims to gauge a user’s initial impression regarding a website’s interactivity and responsiveness.

In contrast, INP measures the duration from all user interactions, including clicks, taps, and keystrokes, to the moment the following frame displays with visual feedback. This measurement encompasses all interactions throughout a webpage’s lifespan rather than solely focusing on the first input during the page load.

The primary objective of INP is to evaluate a webpage’s comprehensive responsiveness to user input.

An INP value of 200 milliseconds or less signifies excellent responsiveness, while values exceeding this threshold indicate a need for improvement.


The Supporting Evidence for Core Web Vitals as a Ranking Factor


In 2020, Google Search Central made an advanced announcement regarding integrating ranking signals tied to forthcoming page experience metrics, famously known as Core Web Vitals.

In their corresponding blog post, they articulated the following:

“In the preceding month, the Chrome team unveiled Core Web Vitals, a suite of metrics centered around speed, responsiveness, and visual stability. These metrics were introduced to assist website owners in quantifying the user experience across the web.

Today, we are building upon this foundation by offering an early glimpse of an imminent alteration in Search rankings that will incorporate these page experience metrics.


We are poised to introduce a novel signal that amalgamates Core Web Vitals with our preexisting indicators for page experience. This amalgamation is designed to offer a comprehensive assessment of the overall quality of a user’s encounter while navigating a webpage.”

In 2021, Google conducted a concise “Ask Me Anything” (AMA) session centered around Web Vitals. Within this interactive session, an inquiry arose regarding whether page experience served as a binary ranking factor.

Philip Walton, a Google engineer specializing in web performance, responded, clarifying that Web Vitals were primarily not regarded as a binary ranking factor.

Further insights emerged during the AMA, with John Mueller, a Google Search Advocate, affirming that while Core Web Vitals (CWV) influence rankings, relevance remains a potent determinant. Mueller illustrated that even if website A exhibited superior speed to website B, the latter could still outrank A if it demonstrated greater relevance to the search user’s query.


Mueller also emphasized that websites transitioning from a “needs improvement” status to a “good” quality may experience enhancements in their rankings. However, websites already classified as “good” that make marginal speed improvements on the order of milliseconds may not observe significant changes in their rankings.

In the year 2021, Google issued an update to its original blog announcement concerning Core Web Vitals (CWV). This update confirmed the completion of the page experience rollout by August 2021.

In September 2022, Mueller referenced the page experience ranking factor in a Reddit comment about accurate speed testing tools. He elaborated, stating:

“If you navigate to web.dev, you’ll discover that Google provides an array of metrics extending beyond a singular numerical score. Some of these metrics are grouped under the category of ‘core web vitals,’ there are methods to assess them in real-world conditions using ‘real user metrics’ (RUM), which encapsulate what users encounter. Additionally, ‘lab tests’ enable you to evaluate performance from your end.


For the page experience ranking factor in search, Google relies on accurate user metrics derived from field data. I recommend utilizing core web vitals field data, also known as Chrome User-Experience Report data or CRUX, as a benchmark for critical pages within your website (bearing in mind that pages may exhibit variations). Subsequently, employ lab tests for core web vitals to replicate these findings and collaborate with your developers to address any identified issues. Lab tests facilitate swift experimentation and assessment of their impact, while field data requires approximately a month to update.”


Skipping ahead to April 2023, Google introduced a “simplified” approach to its guidance regarding page experience signals in search rankings. Although Google continues to advocate for robust Core Web Vitals (CWV) to ensure an optimal user experience and maintains the utilization of these metrics as ranking signals, it’s important to note that enhancing one or more of these metrics does not automatically guarantee improved rankings.

Page experience remains a pivotal ranking factor, but Google now assesses it comprehensively through its core ranking systems rather than as a standalone “page experience signal.”

Furthermore, in July 2023, Mueller delivered updates to Google Search Central audiences via YouTube, revealing the forthcoming integration of Interaction to Next Paint (INP) into Core Web Vitals (CWV), scheduled for 2024.


Core Web Vitals: A Verified Ranking Influence


Google has officially affirmed the impact of Core Web Vitals on search result rankings. Nevertheless, it’s crucial to understand that Core Web Vitals do not constitute an independent ranking “system” per se; instead, they contribute to evaluating overall page experiences.

These metrics influence the helpful content ranking system, contributing to the broader array of page experience signals.

For actionable guidance on enhancing your Largest Contentful Paint, First Input Delay, Cumulative Layout Shift (CLS), and the upcoming Interaction to Next Paint (INP), Google’s web.dev documentation is a valuable resource. Implementing improvements in these metrics enhances your users’ experiences and positively impacts your website’s rankings.

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Shilpi Mathur
[email protected]