{"id":666,"slug":"renault-1s-lcp-14pp-bounce-2021","title":"Renault (2021): 1s LCP improvement → -14 ppt bounce rate, +13% conversions (regression analysis, multi-month, millions of sessions)","kind":"reference","scope":"business","status":"current","audiences":["kevin","smb-owner","candid-team"],"topics":["core-web-vitals","conversion-rate"],"reference_body":"**Claim:** Renault analyzed 4 months of data across multi-million sessions. A 1-second LCP improvement was associated with **-14 percentage points of bounce rate and +13% conversions.**\n\n**Source:** web.dev/case-studies/renault (2021).\n\n**Methodology:** linear regression on multi-month real-user data. Not a true A/B test; pre/post or regression-based.\n\n**Confidence:** Medium — performance correlation is well-isolated but not in an A/B sense.\n\n**Use:** good for the \"we make pages faster and conversions go up\" general argument; not as airtight as [[vodafone-31pct-lcp-8pct-sales-2021]] or [[rakuten24-cwv-conversion-33pct-2022]].","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"lcp-killers-catalogue","title":"Reference: the 8 most common LCP killers — ranked by observed frequency","kind":"reference","scope":"business","link_type":"relates-to"}],"incoming":[]},"created_at":"2026-05-22T21:24:18.352Z","updated_at":"2026-05-22T21:24:18.352Z"}