How does site speed affect cart abandonment rates?

I've been pulling my hair out trying to understand why customers keep leaving my Shopify store right before purchasing. Our traffic looks great, ad spend is solid, but something's breaking down at the checkout. After diving deep into analytics, I realized site speed might be the silent killer of my conversion rates. Every second of load time feels like an eternity to a potential customer. Imagine spending hundreds or thousands on ads, getting someone excited about your product, and then losing them because your site takes 5 seconds to load instead of 2. It's like inviting someone to an amazing party and then making them wait outside in the cold. The frustration is real. I've watched session recordings where customers literally hover over the checkout button, get impatient with a slow-loading page, and then just... disappear. My bounce rates are killing my ROAS, and I know I'm not alone. E-commerce is a split-second game now. Customers have zero patience for technical friction. They want instant gratification, smooth experiences, and if you can't provide that, they'll find a competitor who can in milliseconds. This isn't just about load times anymore—it's about creating a frictionless, lightning-fast shopping experience that keeps customers engaged from first click to final purchase.