Audits Google SEO

How to Optimize for Google Core Web Vitals

How to Prepare for the Core Web Vitals Rollout

Fixing poor user experiences on a business’s site has moved to the top of many priority lists.

One thing we know already is that Google plans to use and build on its new Google Search Console Core Web Vitals Report. It’s meant to help businesses do more that just get their pages crawled and indexed, it is more about making them more valuable to users.

What are Google Core Web Vitals?

Google Core Web Vitals is a set of reports added to the Google Search Console in 2019 that comprise a small set of core metrics around load speed. They help search marketers and development teams know how well or poorly a site is delivering its web pages. Google scores each web page according to how well it performs in offering a delightful experience to site visitors. The Core Web Vitals report details how web pages perform based on real world usage data, also known as field data.

These new ranking factors are fast approaching. While every site benefits from adding essential schema markup types, use nesting and stick what’s more important to avoid code bloat.

Let’s back up a bit and review how we got here.

The History of Site Speed and Google Core Web Vitals

What is the timing for the Google Page Experience roll out?

On November 10, 2020, Google announced, “The page experience signals in ranking will roll out in May 2021. The new page experience signals combine Core Web Vitals with our existing search signals including mobile-friendliness, safe-browsing, HTTPS-security, and intrusive interstitial guidelines”.

Let’s back up and get a clear overview. The year 2010 saw Google first start using how quickly a web page loads on a desktop computer as a ranking signal.

Google has been pushing mobile-friendliness as a ranking signal beginning in 2015. By 2018, the Mobile-First Index process launched as official. Webmasters and site owners were notified in the Search Console when Google determines that a site is ready for mobile-first indexing. This occurs by Google evaluating the mobile version of your website during the process of assessing it for search purposes; you cannot trigger it.

In early 2020, Google introduced its new set of tools within its Google Search Console, called the Core Web Vitals. It explicitly said the metrics in these reports will become ranking signals in 2021. Core Web Vitals expands on the previous site speed metrics to help businesses address how some web pages mobile advertisements and support files load .

The introduction of the Web Core Vitals alerts any straggling website owners not concerning themselves with mobile-friendliness that it clearly matters. While the Mobilegeddon update was a slow rollout, the importance of making a site a better experience for mobile users now must be faced .

Google’s investment in tools and reports on Site Speed and Mobile are signals to website owners that they need make their websites easier to use or expect to become only an online calling card. Today we’re announcing that the page experience signals in ranking will roll out in May 2021.

What Basic Metrics make up the Google Search Page Experience?The Google search page experience explained

The top three Google search page experience metrics explained:

  • Loading: LCP assess how long it takes for the largest content element (such as a featured image, hero image, or H1 heading text) on a specific web page to become visible within a visitors’ viewport. Seek to gain for an LCP of 1.2 seconds or less.
  • Interactivity: FID (first input delay): The time clock is running from when a user first interacts with your page (like when a link is clicked, a button triggered, etc.) to the time when the browser responds to that interaction. This measurement is derived from whatever interactive element that the person first clicks. This is important on pages where the visitor needs to do something, because this is when the page has become interactive. Also called TBT reports (in GTmetrix); it represents how much time is blocked by scripts that are called on during the page loading process. Seek to gain a TBT of 150 milliseconds or less.
  • Visual Stability: CLS indicates how much of a page’s layout shift a visitor experiences as your page loads. Seek for a CLS score of 0.1 or less.

To audit your content to determine if it meets the Core Web Vitals threshold to be labeled with a Fast Page badge, use Google’s developer tools to assess load speed. To assist with these optimization tasks, GTmetrix has grown more sophisticated. GTmetrix Reports added a new scoring methodology. The former PageSpeed and YSlow reports have updated to an overall GTmetrix Grade. Powered by Lighthouse, GTmetrix users now obtain a Performance and Structure Score.

What is First Input Delay (FID)?

FID is a score that assess how long it took the browser to manage other tasks before it could deal with a person taking action such as a tap or click. This signals how responsive the UI experience is to a user, and measures the burden of the CPU with JavaScript processing.

Just how a page executes JavaScript, both in the page load and during the page lifecycle directly affects the FID. The time it takes for JavaScript to be completely executed matters if visitors try to complete an action before the app is completely ready.

Ways to improve First Input Delay:

GTmetric and other waterfalls do a great performance trace to disclose where load time is consumed excessively. Once identified, they can be investigated and resolved.

What is the New Google Page Experience Indicator?

Google will show users the quality of a web page’s Core Web Vitals with it’s new Page Experience indicator. This is already displaying in some SERPS. It is similar in size and shape to the AMP icon indicating an Accelerated Mobile Page’s status. As Google is great at testing and interiations, this may well look different as it is more widely adopted.

While the Core Web Vitals metrics provide more detailed information that we’ve had before in Google Search Console reports, it is likely that many false positives will surface after the full roll out.

How to Determine the Most Important Core Web Vital TasksHow to Determine the Most Important Core Web Vital Tasks

Focus on the most impactful load speed metrics first before undertaking deeper web site performance optimizations.

1. Resolve everything that is labeled “Poor” first.

2. Next prioritize your task list by which issues negatively impact the most URLs, or by issues that are hurting your most revenue generating URLs.

3. “Needs improvement” issues are now next on the priority list.

The need for drastic improvement in the Layout Content Shift quite surprised me. The page has no late loading ads above the content, no intrusive interstitials, and all images had their width and height properly defined. However, the original featured image’s size was 1280 by 860 pixels. This was causing an image resizing issue; when the browsers were loading it, they were resizing it to 1200 by 800 pixels. This causes a layout shift and ensuing loading delay. Ensure that your images are sized correctly for JASON-LD Schema markup.

When you’ve fixed a specific issue in all of your URLs, you can confirm whether you fixed the issue for all URLs. Click Start Tracking to start a 28-day monitoring session to check for instances of this issue in your site. If this issue is not present in any URLs on your site during the 28-day window, the issue is considered fixed. The presence of that issue in any URL is sufficient to mark the issue as unfixed; however the status of individual URLs remains under evaluation for the full 28 days, no matter what the issue status is.

How to calculate the CLS score?

A page’s CLS score is computed by multiplying the proportion of the user’s screen that shifted unexpectedly when loading by the distance it traveled. Sites sometimes even face having half of the screen impacted by the content shift. That is annoying to viewers. Simultaneously, the distance the content had to go on the screen factors in. Therefore, to calculate the CLS score, multiply the impacted screen area (0.5) by the distance traveled (0.15) and you can gain a useful score.

Which Core Web Vitals Metrics can be Improved by Loading CSS Async?

Because it is what people see first, metrics calculated in the above the fold section means ensuring key content that is visible to the user is seen fast. Some content and support files can be loading in the background until you reach “Fully loaded time”.

According to Koray Tuğberk GÜBÜR owner of Holistic SEO, “In the relationship between loading CSS Files as Async and opening web pages earlier for the user, some Pagespeed Metrics are more positively affected than others. Faster loading of CSS Files especially improves First Paint, First Contentful Paint, Largest Contentful Paint, and Speed Index metrics”.

Place your key content above the fold where it can be easily seen to match the searchers’ intent. Don’t make site visitors wait to find answers to their questions.

How does Google Measure Load Speed?

Suggestions for improvement and diagnostics found in PageSpeed Insights are generated from lab tests; performance metrics are more accurate when gleaned from field results. Once you own a general idea of how to improve PageSpeed, the logic of how Google scores this can positively impact your web vital results.

Three new performance metrics umbrella this world of web performance. they are supported through an API in Chrome, Chrome on Android, Chromium Edge browsers. The data that Google relies on for Page Experience measurement is derived from the Chrome UX Report (CRUX). It is comprised of anonymised performance statistics that real page loads in Chrome browsers across the globe provide.

Being independent of cache state, CRUX assesses all regular page loads including both landing and mid-session web pages. It skips soft navigations, also called route changes, within single page applications. Soft navigations have the potentially to be penalized. Lower CLS scores and LCP values signal a reduced change of users experiencing unexpected layout shifts.

How to Set-Up Tracking for Core Web Vitals Optimization Progress?

Google makes it easy to submit and track a validation request:

Start tracking does not trigger re-indexing or any other active behavior from Google. It just (re)starts the clock on a 4-week monitoring period of CrUX data for your site by Search Console.
  • To see the validation details for an in-progress validation request or for a request that has failed:
    • Click See details in the validation status section of the issue details page.
  • To restart the validation tracking period at any time:
    • Open the validation details page and click Start new validation.
  • If validation fails:
    1. Try again to fix your issues.
    2. Restart the tracking period by opening the validation details page, and clicking Start new validation

Both a summary page and an issue details page display.

Core Web Vitals Testing Tools

When testing your Core Web Vitals, use an incognito window to bypass unwanted issues.

There are several tools now available; we prefer Lighthouse. By using many you can have more of an overall perspective. However, they differ considerably in their applications, required skill levels for technical proficiency, and reports. The Search Console is very useful for being each site’s Core Web Vitals dashboard. Gaining a bird’s-eye view of an entire website – according to Google – is vital for success. The Chrome Extension and PageSpeed Insights are better for those quick page assessments. We’ll add more here over time.

Once this work is in place, we’ll cover your Search Marketing Progress Reports in person. We want you to understand and enjoy the benefits.


Optimizing for Core Web Vital performance metrics, as measured by Google in CRUX, may be a big boost in the future. But even before these web vitals become a ranking factor, it will carry a positive impact on your site’s user experience. Consumers want faster experiences. Improving load speed issues leads to lower bounce rate, higher page session length, better user satisfaction scores, better conversion rated, increased SEO traffic. Ultimately, all this leads to increased revenue.

The great thing about page performance optimizations is that is it often achieved with relatively minor code improvements.

Hill Web Creations can lead your optimization efforts by starting with a Comprehensive Technical SEO Audit.