I'm going to give you a number that changes the perspective of many store owners I work with: every additional second of loading reduces your conversion rate by 7% to 20%. This is not a theoretical estimate. It's what Google's data shows and what I've seen confirmed in dozens of stores in LATAM.
Put another way: if your store takes 4 seconds to load instead of 2, you could be losing between 14% and 40% of your potential sales. Without changing your products, without lowering prices, without investing more in advertising.
In this article, I'll explain why your Shopify store's speed matters so much, what the most common causes of slowness are, and what you can do today to improve it.
Why your Shopify store's speed directly impacts your sales
Speed is not an abstract technical issue. It's a business issue with a direct impact on three critical areas:
1. Conversion rate
A visitor who waits more than 3 seconds is much more likely to abandon your store before seeing a single product. On mobile, where the connection can be slower, the patience threshold is even lower.
I've seen it in dozens of stores in LATAM: optimizing loading speed can increase the conversion rate by 15% to 30% without changing anything else. It's one of the highest ROI interventions in e-commerce.
2. SEO positioning
Google has been using loading speed as a ranking factor since 2021, especially on mobile (Core Web Vitals). A slow store not only loses visitors but also loses positions in search results, which reduces organic traffic.
If your store has good SEO content but loads slowly, you're competing with one hand tied behind your back.
3. User experience and trust
In LATAM, where distrust of online stores is still high, a slow store reinforces the perception that something is not right. The customer doesn't think "this store has technical problems." They think "this store is not trustworthy" and leaves.
How to measure your Shopify store's speed
Before optimizing, you need to know where you stand. These are the tools I use with my clients:
Google PageSpeed Insights
A free Google tool that analyzes your store on mobile and desktop, gives you a score from 0 to 100, and shows you exactly what's causing the slowness. Access it at pagespeed.web.dev.
Score reference:
- 90-100: Excellent
- 50-89: Needs improvement
- 0-49: Slow, requires urgent attention
Most Shopify stores that come to me have mobile scores between 30 and 60. With optimization, it's possible to reach 70-85 in most cases.
Shopify Speed Report
Available in your Shopify dashboard under Online Store > Themes. It shows you your theme's speed score compared to other Shopify stores. It's a useful reference but less detailed than PageSpeed Insights.
GTmetrix
An alternative to PageSpeed with more technical detail. Useful for identifying specific resources that are slowing down loading. Available at gtmetrix.com.
The most common causes of slowness in Shopify stores
After auditing dozens of stores in LATAM, these are the causes I find most frequently:
1. Unoptimized images
This is by far the most common cause. Product images uploaded directly from the camera (3-10 MB each) that Shopify has to load completely before displaying the page.
The solution: compress images before uploading them (free tool: squoosh.app) and use modern formats like WebP. A product image should not weigh more than 200-300 KB.
2. Too many installed apps
Each app you install adds JavaScript scripts to your store that load on every page. 15 active apps can add 2-4 seconds of additional loading time.
What many don't know: uninstalled apps can leave residual code in your theme. That code continues to load even if the app is no longer active.
3. Heavy or poorly optimized theme
Some Shopify themes, especially the more visual ones with many animations, are inherently slow. If your theme has a low score even with few apps and optimized images, the problem may be in the theme itself.
4. Background videos or sliders with multiple images
Background videos in the hero section of the home page and sliders with 5-8 large images are two of the elements that most negatively impact speed. On mobile, where most traffic in LATAM comes from, they are especially harmful.
5. Multiple custom fonts
Loading 3-4 different font families adds to loading time. Limiting fonts to 1-2 families and using the font weights you actually need can improve performance.
6. Unoptimized third-party scripts
Facebook Pixels, Google Analytics, Google Tag Manager, Hotjar, live chat, and other tracking scripts load on every page. If they are not properly configured (deferred loading, etc.), they can block page rendering.
💡 Do you want me to audit your store's speed and tell you exactly what's causing the slowness? This is one of the most requested services. Visit yosoyexperto.com and schedule a session.
Solutions you can apply today
Here are concrete actions ordered from highest to lowest impact and lowest to highest technical difficulty.
Action 1: Optimize all your images (high impact, low difficulty)
Download your product images, compress them with squoosh.app or TinyPNG, and re-upload them. Goal: less than 300 KB per image. If you have many products, you can use an app like Crush.pics for bulk compression.
Action 2: Audit and eliminate unnecessary apps (high impact, low difficulty)
Go to your Shopify dashboard and review all installed apps. Ask for each one: is this app generating measurable value? If the answer is not a clear yes, uninstall it. After uninstalling, review your theme's code to remove residual scripts.
Action 3: Limit the home page slider (medium impact, low difficulty)
If you have a slider with more than 3 images, reduce it to a maximum of 2-3. Better yet: replace the slider with a high-quality static image. Sliders have very low interaction rates and a high performance cost.
Action 4: Configure lazy loading for images (medium impact, medium difficulty)
Lazy loading ensures that images not in the initial viewport are not loaded until the user scrolls. Most modern Shopify themes already include it, but it's worth checking.
Action 5: Remove residual code from uninstalled apps (medium impact, medium-high difficulty)
This requires accessing your theme's code and looking for scripts from apps that are no longer active. If you don't have experience with code, it's best to do it with the help of an expert to avoid breaking anything.
Action 6: Consider changing themes if the problem is structural (high impact, high difficulty)
If your theme has a low score even with everything else optimized, it may be time to migrate to a faster theme. Official Shopify themes (Dawn, Craft, Sense) are optimized for speed and are a good starting point.
💡 Do you need help with medium or high difficulty actions? I have hourly packages designed for exactly this type of technical optimization. Check the options at yosoyexperto.com/precios.
Core Web Vitals: the metrics Google uses to measure your speed
If you want to understand speed at a deeper level, you need to know about Core Web Vitals. These are the three metrics Google uses to evaluate your site's user experience:
LCP (Largest Contentful Paint)
Measures how long it takes for the largest visible element on the screen to load (usually the main hero image). Goal: less than 2.5 seconds.
FID / INP (Interaction to Next Paint)
Measures how long your store takes to respond to the user's first interaction (a click, a tap). Goal: less than 200 milliseconds.
CLS (Cumulative Layout Shift)
Measures how much page elements move while loading (that frustrating phenomenon where you're about to click on something and it moves). Goal: less than 0.1.
You can see your Core Web Vitals in Google Search Console and PageSpeed Insights. If any are red, it's an optimization priority.
Frequently asked questions about Shopify store speed
What is a good speed score for a Shopify store?
On desktop, a score of 70+ in PageSpeed Insights is good. On mobile, where scores are naturally lower, a score of 50+ is acceptable and 65+ is excellent. Most well-optimized Shopify stores are between 55 and 80 on mobile.
Is Shopify slower than other platforms?
Not necessarily. Shopify has a solid infrastructure with a global CDN. Slowness in Shopify stores almost always comes from unoptimized images, too many apps, or heavy themes, not from the platform itself.
How long does it take to optimize a Shopify store's speed?
It depends on the current state. Basic optimization (images, apps, residual code) can be done in 3-6 hours. Deep optimization that includes theme changes or code restructuring can take 10-20 hours.
Do speed optimization apps really work?
Some do, but with caution. Apps like Crush.pics for images are useful. But apps that promise to "automatically increase your speed" sometimes add more code than they remove. Always measure before and after installing any optimization app.
Should I worry about speed if I'm just starting out?
Yes, but it's not your number one priority. First, make sure you have well-configured products, working payments, and traffic. But from the beginning, upload optimized images and don't install apps you don't need. It's easier to maintain a fast store from the start than to optimize it later.
Conclusion: speed is a competitive advantage that few leverage in LATAM
Most stores in LATAM have mediocre speed scores. This means that if you optimize yours, you have a real advantage over your competitors: more conversions with the same traffic, better Google ranking, and a user experience that builds trust.
Best of all: many of the most impactful optimizations don't require large investments. Compressing images and deleting unnecessary apps can significantly move the needle without spending a dime.
If you want to go further and do a deep optimization of your store, I'm here to help you. I audit your store, identify bottlenecks, and solve them with a flexible hourly package.
Ready to have a faster store that converts better?
👉 yosoyexperto.com/precios — Choose your hourly package and let's get started this week.
Or write to me on WhatsApp with your URL, and I'll tell you in less than 24 hours what your store's current score is and what's causing the slowness.
