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Mobile speed

Why is my dealership website slow on mobile?

Because a phone does the same work with less power over a slower connection. A mid-range phone on a cell signal handles every photo and tool far more slowly than an office computer on Wi-Fi. That's why a site can feel fine at the dealership and slow to shoppers, and why Google scores mobile separately.

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Why it feels fast in the office

  • The device. Office computers process page code much faster than the mid-range phones many shoppers carry.
  • The connection. Office Wi-Fi is steadier than a cell signal in a parking lot.
  • The visit. Staff visit daily, so their browser has already saved much of the site. A shopper from an ad arrives with nothing saved.
  • The page. Staff check the homepage. Shoppers from ads and search land on vehicle and inventory pages.
A comparison: in the office the site is checked on a recent computer, office Wi-Fi, a repeat visit and the homepage. Shoppers use a mid-range phone, a cell signal, a first visit and a vehicle page from an ad.
Four differences between where the site gets checked and where shoppers use it.

Why phones matter most for a dealership

Google ranks the mobile version of your pages, and scores Core Web Vitals for phones separately from desktop. Mobile is also where dealership sites fail most: in our Index, 20 of 137 dealership websites passed on phones, against 28 on desktop.

How to test mobile page speed

  1. 1

    Use PageSpeed Insights or our free test

    Both open on the mobile result, which simulates a mid-range phone on a slower connection. Try the free speed test.

  2. 2

    Test the pages shoppers land on

    Start with the pages ads and search send shoppers to, then the homepage. See how to test dealer website speed.

  3. 3

    Check it on your own phone

    Turn off Wi-Fi, open a vehicle page from a real ad, and watch for when the photo and price appear.

What fixes a slow mobile site

  • Send photos at phone size, and load the gallery as the shopper swipes. See vehicle photos and lazy loading.
  • Reserve space for photos and banners so nothing jumps.
  • Let chat, trade-in and tracking tools load after the vehicle and price. Site Speed Engine does this on every page, the day it's turned on.

Sources

Questions

Why is my website loading slow on mobile?

Phones have less processing power and slower connections than office computers, so heavy photos and many tools cost more there. Test the mobile result in PageSpeed Insights to see what's taking the time.

How do I check mobile page speed?

Run the page through PageSpeed Insights or our free speed test and read the mobile result. Then open the page on a phone with Wi-Fi off.

What is a good mobile page speed score?

Lighthouse counts 90 to 100 as good, 50 to 89 as needs improvement, and under 50 as poor. The real-visit Core Web Vitals above the score matter more for Google.

Why is my website fast on desktop but slow on mobile?

The desktop test uses a faster device and connection. The same page code takes much longer to run on a phone, so tools that barely register on desktop can delay the page on mobile.

Does Google use mobile or desktop speed for ranking?

Google indexes the mobile version of a site and reports Core Web Vitals for mobile and desktop separately. For most dealerships, the mobile result is the one to fix first.

How do I make my website faster on mobile?

Size photos for phones, don't lazy-load the first photo, reserve space for everything that loads late, and keep tools from running before the vehicle and price show.