Clear definitions of the metrics, concepts, and signals that impact site speed, search rankings, user behavior, and revenue.
Mobile-first indexing means Google ranks your site based on its mobile version. If something’s missing from your phone layout, Google doesn’t see it.
Learn moreA CDN is a worldwide network of servers that delivers your site’s files from close to each shopper, so pages load faster and survive traffic spikes.
Learn moreAn edge server is a CDN server near your shoppers that serves cached copies of your pages and files, so requests skip the long trip to your origin.
Learn moreNetwork latency is the delay for data to travel between a shopper's device and your server. Every request pays it, so it sets a floor on load speed.
Learn moreA TCP handshake is the three-message exchange a browser and server complete before any page data moves. On distant or slow connections, it adds up fast.
Learn moreCart engagement rate is the share of cart views where shoppers do something with it, like editing the cart or heading to checkout.
Learn moreProduct engagement rate is the share of product page views where shoppers actually interact with the product, not just land and look.
Learn moreOrder completion rate is the share of shoppers who start checkout and actually place an order. It shows how many of your most motivated buyers you keep.
Learn moreThe checkout confirmation experience is what a shopper sees right after paying, from the thank-you page to the order email, proving the order went through.
Learn more