Your ability — as an ecommerce merchant — to improve your site’s speed depends on how easily you are able to modify some of the technical factors of the site and underlying page code. If you are new to ecommerce, page speed is not your top priority. Developing high-quality content is more important. But if you are looking to gain a competitive edge — and provide the best possible user experience — you definitely want to utilize page-speed diagnostic tools and tune your site accordingly.