Speed Kit is a page speed tool for high-traffic websites that can be integrated easily through the browser without any changes to infrastructure. It can improve user experience, SEO ranking, reduce bounce rates, increase session length, and conversion rates. It comes with a speed guarantee and is trusted by market leaders like BMW, Decathlon, Carhartt, and others. It has achieved significant performance improvements for its clients, including a 1.5x faster LCP overall for BMW and a 2.5x acceleration for Decathlon.