If you’ve ever wondered why your website feels slower on your phone than on your laptop, or why your traffic chart looks like a ski slope after a big update, there’s a good chance your site speed is involved. Site speed is one of those things most business owners only think about once something breaks. By then, you’ve already lost visitors and search rankings.
The good news is that checking your website’s speed is incredibly simple. As someone who tests websites every day, I can tell you that the right tools will spell out exactly what’s slowing things down and what to fix first. If you care about growing organic traffic and understanding how to improve your SEO, site speed is a crucial signal to be aware of.
In this guide, I’ll show you how to test your speed, how to read the results, and what good performance looks like today.
Why website speed matters
A fast website makes people stay. A slow website makes people leave. That’s the bottom line.
Speed shapes your first impression. When a page takes too long to load, users bounce before they’ve even seen your value. I once worked with a client whose home page took over five seconds to load on mobile. After we brought that down to under two seconds, their conversion rate increased by roughly 18%. Same traffic, same design, faster page.
Search engines care too. Google uses a set of metrics called Core Web Vitals to judge page experience. As a result, slow pages can significantly hold back your SEO growth.
At Bright Sprout, a speedy site is essential. You won’t find us doing a one-off quick fix, then vanishing. Instead, we build long-term performance into your SEO foundations so you’re not constantly fighting against slow load times.
How to check your website speed
Speed testing is straightforward. You put your URL into a tool, press a button, and get a detailed report. The trick is knowing which tools to use and how to interpret what they’re telling you.
Before you test, make sure:
- You’re testing the full URL, including the HTTPS version.
- You’re testing both mobile and desktop.
- You’re testing at least twice, because results can vary depending on server load.
Test with Google PageSpeed Insights
This is the tool I use the most. PageSpeed Insights gives you a speed score for both mobile and desktop, which helps you easily gauge performance on both platforms. More importantly, it shows how real users experience your pages.
You’ll see terms like LCP or INP (we explore what these actually mean later). What matters right now is the colour system. Green means fast, orange means could be better, and red means slow.
If you use alternative Google tools like GA4 for performance tracking, our GA4 guide may help you connect your metrics.
Test with GTmetrix
GTmetrix is ideal when something feels slow but you’re not sure why. It shows you a waterfall chart that breaks down the site loading step by step. If one script is taking ages, you’ll spot it immediately.
Test with WebPageTest
WebPageTest is for when you want complete clarity. You can choose different locations, devices, or connection speeds. This tool gives you a highly detailed analysis completely free, although it can be overwhelming if you’re new to web development.
How to understand your results
Speed tests can feel technical at first, but you only need to focus on a handful of metrics.
LCP (Largest Contentful Paint)
This measures how long it takes for the largest image or text block to appear.
CLS (Cumulative Layout Shift)
This measures visual stability and prevents content from jumping around.
INP (Interaction to Next Paint)
This looks at how responsive your page feels when someone taps or clicks.
What good page speed results look like
A good score means your site feels fast for real people using real devices.
Ideal Core Web Vitals
- LCP under 2.5 seconds
- CLS under 0.1
- INP under 200ms
Good PageSpeed Insights scores
- 80+ on desktop
- 60 to 80 on mobile
Mobile scores are nearly always lower because phones have weaker CPUs and slower networks.
How to improve your site speed
Most improvements fall into four categories.
Compress and optimise images
- Use WebP where possible and compress images before uploading.
Remove unnecessary code
- Plugins, unused CSS, and old scripts slow everything down. I’ve audited sites where one abandoned tracking tag added a full second to load time.
- If you want more support in streamlining your content and removing underperforming assets, explore our guide on why duplicate content is bad for SEO.
Upgrade hosting and enable caching
- Better hosting produces better performance. Caching ensures returning visitors load your site faster.
Reduce plugins and third-party scripts
- Each script adds a delay. Social widgets, embedded feeds, chat pop-ups. And other extras all add weight.
- This ties neatly into understanding social performance, too. If you want to measure platform-level results more effectively, check out how to measure social media ROI.
Final thoughts
Checking your website speed is simple. Improving it takes strategy. Faster pages mean happier users, stronger rankings, and more conversions. Moreover, site speed isn’t something you tweak once and then forget. It’s part of long-term SEO and performance. That is why we operate as a digital partner, not a distant agency.
If you want hands-on help, you can explore our services:
Or, if you’re ready to take the next step in your organic growth, get in touch today. We love a chat!
