How quickly
does it load?
Separate Google PageSpeed mobile reports with SpeedLayer off and on. These are scores, not shopper outcomes.
Open the two Google reports
JENKINS / PERFORMANCE REVIEW
Find your store
Traffic was randomly assigned to SpeedLayer on or off. Across 23 stores, the ON group recorded 3.05 lead actions per 100 measured users. The OFF group recorded 0.84. Each action is a sales-lead step: a call, text, chat, or form.
You pay to bring shoppers to the site. When a shopper leaves before contact, your team cannot follow up.
The ON group still had 3.2 X the action rate after we matched the store mix. Auto Genius reports random assignment; the workbook does not include assignment logs. These events are not unique CRM leads or sold cars.
A random ON/OFF traffic split shows what SpeedLayer changed: the rate of calls, texts, chats, and forms. Check the rate for each store below.
Separate Google PageSpeed mobile reports with SpeedLayer off and on. These are scores, not shopper outcomes.
Open the two Google reportsThese sales-lead actions are calls, texts, chats, and forms. One shopper can take more than one action. Auto Genius says the ON/OFF assignment was random.
How we measuredStep 1: open the “without” Google report. Step 2: open the “with” report. Compare the mobile scores for the same website; each link opens Google in a new tab.
Find your store for a plain-language comparison and a clear next check. The five stores missing usable measurements are listed separately below.
Choose a store. Enter your monthly numbers. See the cost of each car sold with SpeedLayer on and a possible off case. The off case is a model, not a measured result.
Select a measured store to explore its observed engagement and lead-action rates.
See the engagement and bounce rates for your store. Use your ad spend to see a possible dollar difference. These are not measured paid-ad dollars saved.
We do not have separate data for paid traffic.
The engagement data are for all traffic on selected Mondays. Your ad spend is a monthly amount. The model assumes that paid traffic acts the same way. We have not tested this assumption. A bounce does not prove that you wasted ad spend.
Enter your cars sold, unique leads, and close rate for the same month. The model applies the observed website rate gap to those leads. It does not predict lost cars.
Digital ad spend per total car sold
Enter your monthly numbers.Digital ad spend per modeled total car sold
No measured off-month sales.Enter your numbers to see the modeled difference.
The ad spend stays the same in both cases. For the off case, the model applies the observed website action-rate gap to your unique leads. It multiplies the lead gap by your close rate. Auto Genius reports random ON/OFF assignment, but the workbook does not include assignment logs. Website actions are not unique leads. Total sales include other sources. Spend divided by all cars is not the cost of a car from ads. Your entries stay in this browser.
These five properties do not have a usable shopper-action comparison. We do not rank them as poor performers. Here is the measurement step for each.
A decision to stay deserves evidence you can inspect, not a magic percentage. The source workbook is retained privately; individual Google PageSpeed mobile reports are linked from the store views.
Lead actions are forms, texts, chats, and mobile click-to-calls. The rate divides total action events by deduplicated GA4 users, not visits; the group sums those store-level user counts, so a person visiting two stores can appear twice. This is a lead-action signal, not deduplicated leads, sales, revenue, or actual ROI. Auto Genius says eligible traffic was randomly assigned to ON or OFF. The workbook has audience totals, not assignment logs.
Before you remove SpeedLayer, check the ON/OFF result for each store. Fix missing measurements. Keep the shoppers who are ready to contact you.
Check your store