Hey {{first_name}},
I’m not going to regurgitate the old story about Amazon’s “1 second delay costs X” or whatever the fable is…
It’s been remixed so many times that it’s basically eCommerce folklore at this point.
But here’s what I can share…
A case study from Rakuten 24 (a big Japanese eCommerce brand).
They invested in Core Web Vitals improvements and ran an A/B test to measure the impact.
What did they actually improve?
LCP (Largest Contentful Paint): 2.0s → 0.4s
CLS (Cumulative Layout Shift): Improved by 92.75%
FID (First Input Delay), the old version of INP (Interaction to Next Paint): Improved by 7.95%
They split traffic 50/50 for a month between:
A) the optimised version of a high-traffic landing page
B) the original page
And these were their results:
Revenue per visitor up 53.37%
Conversion rate up 33.13%
Average order value up 15.20%
Exit rate down 35.12%
Yes, Rakuten 24 is a big player.
But even if your store gets 10% of that impact, you’re not exactly going to be upset about it, are you?
Chat soon,
Peter
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