WPO Stats

Case studies and experiments demonstrating the impact of web performance optimization (WPO) on user experience and business metrics.

  • WPO Stats Icon

    Sunday Citizen improved their key performance metrics and were able to achieve 25% improvement in Largest Contentful Paint and 61% in Cumulative Layout Shift at the 75th percentile. This resulted in 4% decrease in bounce rate and over 6% increase in conversion. Permalink Share on Twitter

    #bounce rate #conversion rate #2022 #core web vitals
  • WPO Stats Icon

    Rakuten 24 ran an A/B test showing improved vitals brought a 53.4% incrase in revenue per visitor, 33.1% increase in conversion rate, 15.2% increase in average order value, 35.1% reduction in exit rate and more! Permalink Share on Twitter

    #bounce rate #revenue #traffic #abandonment #session duration #conversion rate #2022 #core web vitals
  • WPO Stats Icon

    Groupe Renault found a strong correlation between Largest Contentful Paint and both their bounce rate and conversion rate, with a 1 second improvement leading to up to a 14 percentage point decrease in bounce rate, and 13% increase in conversions. Permalink Share on Twitter

    #bounce rate #conversion rate #2021 #core web vitals
  • WPO Stats Icon

    SpeedSense worked with an e-commerce company to improve performance and saw a 7.6% increase in sitewide conversion, translating to roughly a $6 million lift in annual revenue. Mobile transactions increased by nearly 30% and sales per session increased by 16%. Permalink Share on Twitter

    #conversion rate #revenue #2021 #conversion #engagement
  • WPO Stats Icon

    Ingram Micro focused on reducing Total Blocking Time and saw a 35% increase in organic traffic by improving their homepage TBT by 40%. Permalink Share on Twitter

    #core web vitals #page views #2021 #conversion #engagement #search #seo #sessions #traffic
  • WPO Stats Icon

    Swappie reduced load time by 23%, LCP by 55%, CLS by 91% and FID by 90% and saw a 42% increase in mobile revenue and a 10 percentage point increase in relative mobile conversion rate. Permalink Share on Twitter

    #revenue #conversion rate #2021
  • WPO Stats Icon

    NDTV, one of India's leading news stations and websites, improved LCP by 55% and saw a 50% reduction in bounce rate. Permalink Share on Twitter

    #bounce rate #core web vitals #2020
  • WPO Stats Icon

    iCook improved CLS by 15% and saw a 10% increase in ad revenue as a result. Permalink Share on Twitter

    #ads #core web vitals #2021
  • Tokopedia Logo

    Tokopedia improved LCP by 55% and saw a 23% increase in average session duration. Permalink Share on Twitter

    #session duration #core web vitals #2021
  • WPO Stats Icon

    Vodafone improved their LCP by 31%, resulting in an 8% increase in sales, a 15% increase in their lead to visit rate, and an 11% increase in their cart to visit rate. Permalink Share on Twitter

    #sales #core web vitals #2021
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Hungry for more?

If you're looking for more resources around selling performance, we recommend the following resources:

  • Time is Money book cover

    Time is Money by Tammy Everts

    Tammy's book has study after study after study about why performance matters. She covers not just the business side of things, but also the psychology of performance: how does bad performance make users feel.
  • Designing for Performance book cover

    Designing for Performance by Lara Hogan

    Lara's book is loaded with great information about advocating for performance within your organization.
  • Path to Performance Logo

    Path to Performance Podcast hosted by Katie Kovalcin and Tim Kadlec

    The Path to Performance was a podcast dedicated to helping people figure out how to cultivate a culture of performance within their organizations.

Help make WPO Stats better by submitting your favorite performance case study.

@2023. A Tammy Everts and Tim Kadlec production.