SEO: Using Lighthouse to Improve Site Speed

Site velocity is difficult for SEO practitioners. It’s a ranking sign for Google and a key issue in the customer’s revel in. Studies by way of Walmart and Amazon found that even with small fractional improvement topics, every business enterprise attributes a 100-millisecond improvement in page load speed to a 1 percent growth in sales.

Moreover, Think with Google discovered that slower website speeds can notably lessen conversions and increase bounces — up to a 20 percent lower conversion price for a single second postponement.

That places search engine optimization professionals in an ungainly function. We recognize that it’s essential. However, few among us have the development chops to clear up the thorny technical troubles that underpin speedy web page velocity instances.

So now what? One option is to use Google’s Lighthouse, a loose website auditing device, in Chrome’s “Developer Tools” menu at View > Developer > Developer Tools > Audits.

Lighthouse presents unique tips for improving a domain’s technical first-class and speed. Best of all, each Lighthouse recommendation includes a list of individual files to optimize and a “Learn more” hyperlink to apprehend the basics before you approach your developers.

In my enjoyment, Lighthouse Maximum often cites the subsequent four areas to enhance site velocity.

4 Speed Tips from Lighthouse

Eliminate render-blocking. Every time visitors land on a page, their browser has to request, download, and process external CSS and JavaScript files. That’s what render-blocking means. Your site visitors have to watch for their browser to method every render-blockading record earlier than they can see the matters they want to buy, let alone add them to the cart.

CSS and JavaScript are effective tools. But they also can slow down a site.

Some JavaScript and CSS files don’t want to load to display significant page content material or center capability at the start of the process. Packing those noncritical files earlier than the content material will increase bounce quotes.

7 Ways to Boost your Website Speed

For JavaScript, include essential portions inline in the HTML when possible. Use the async or defer attributes for noncritical portions to postpone loading after the alternative, more critical elements.

Critical CSS can be inlined, too, to eliminate a time-consuming trip to the server for a second request. CSS documents can also be parsed via device through the media question string. In this method, each stylesheet hyperlink within the HTML must have its own media attribute so that the browser most effectively executes what’s wished for that person’s device.

Deliver smaller payloads. HTML, CSS, and JavaScript can all be minified and compressed to reduce report length similarly.

Minification is the artwork of shrinking the number of code characters without converting how the browser tactics it. Minification examples consist of putting off remarks, carriage returns, formatting, and useless strings.

Compression reduces the scale of a file — just like a zipping tool. Compression services and Brotli or Gzip squish textual content documents into smaller packages without changing their interior or how they work.

Optimize pix. Optimization is not about decreasing the image nicely. Formats consisting of JPEG 2000, JPEG XR, and WebP offer pleasant visuals at better compression charges. This means that they’ll load more quickly.

Also, remember responsive pix, which specify the image size for each web page load. This generates several sizes of every picture and serves the smallest one needed for each web page. It can shave seconds off the load time for a picture-heavy web page.

If you have the finances, a content material shipping community that optimizes images could make this system plenty less complicated.

Extend browser caching.

Your visitor’s browser can temporarily stop a report. This is reachable for repeat visits to a web page and documents used across the web page. The browser accesses its local, saved replica every time it wishes to load that document until the file’s cache length expires. Then, the browser requests a new edition and caches it once more.

This doesn’t do an issue for that first-time traffic. But it allows those who make it past the first click and those who return to your website online.

What happens when you want to push an important replacement on your website? Your development group can invalidate the antique cache to replace the record. The browser receives the new picture, text, and CSS report, any useful resource.

Saving Lighthouse Reports

You can’t print your Lighthouse reports from the console. But you can download the results. The download, unluckily, is not in a digestible text format. But GitHub has a viewing answer. Open this web page on GitHub. Drag the downloaded Lighthouse record from your document supervisor to the GitHub page on your browser. The web page renders the form, complete with clickable help links and the standard printing and saving options from your browser.


I have been working in the field of SEO and content marketing since 2014. I have worked with over 500 clients and more than 100 websites. I started blogging in 2012 and have now made my first steps into the world of freelancing. In my spare time, I like to read, cook or listen to music.