Aim for 'not painfully slow', not a perfect score
You will never get a Shopify store to a flawless 100 on a speed test, and you don't need to. Shopify's own platform code, the analytics, the checkout, adds overhead you can't strip out. Owners waste weeks chasing the last few points that no customer will ever feel.
The target is simple: your store loads fast enough on a mid-range phone on mobile data that nobody gives up waiting. Test on your actual phone, not a fast laptop on office wifi. That's the experience that counts.
The number one culprit: giant images
Oversized images are the single most common thing dragging Shopify stores down. A 4000-pixel, 3MB product photo displayed in a 600-pixel slot forces every visitor to download data they'll never see, and it's the first thing that stalls a page on mobile.
Compress and resize your images before uploading, export product shots at sensible dimensions, run them through a compressor, and let Shopify serve modern formats. This one change alone fixes a lot of 'my store is slow' problems on its own.
App bloat: the slow accumulation
Every app you install can inject its own scripts and styles into every page, and they often keep loading even after you stop using the app. Ten, fifteen, twenty apps later, your store is dragging a pile of code around on every single visit.
Audit your apps. Uninstall the ones you don't use, and remember that properly removing an app often means cleaning leftover code out of the theme, not just clicking delete. Fewer apps is one of the biggest speed levers most stores never pull.
Heavy themes and sliders nobody asked for
Some themes ship bloated, and homepage sliders, auto-playing video backgrounds and animation-heavy sections look impressive and load like a brick, especially on mobile. A giant hero video that delays the whole page rarely earns back what it costs in lost visitors.
Favour a lean, well-coded theme, and be ruthless about heavy homepage elements. If a slider or video background is pushing your load time up and your buy button down, it's costing you more than it's worth.
Too many third-party scripts
Tracking pixels, chat widgets, review popups, ad tags: each one is a call out to someone else's server before your page can finish. A handful is fine. A dozen, and your page is waiting on a dozen other companies to respond before your customer can act.
Keep only the tracking and widgets you genuinely use and act on. Every third-party script you remove is one less thing standing between the visitor and your store loading.
What to do, in order
Compress and resize your images first, it's the biggest win for the least effort. Then audit and cut unused apps, clean out their leftover code, trim heavy homepage elements like sliders and video backgrounds, and remove third-party scripts you don't need. Retest on a real phone after each step so you can see what actually moved.
Ignore the vanity score and chase the felt experience. A store that loads quickly on a phone keeps more visitors and ranks better, and you'll have got there by fixing real things, not gaming a number.