There is no definitive answer to this question as different people have different preferences. Some people prefer sites that offer a wide variety of products, while others prefer sites that specialize in a particular type of product. Some people prefer sites that offer great deals, while others prefer sites that have a more high-end feel. Ultimately, the best ecommerce site for you is the one that meets your specific needs and preferences.
Some popular ecommerce sites include Amazon, eBay, and Etsy. These sites offer a wide variety of products and have a global reach. However, there are also many smaller, more niche ecommerce sites that might be a better fit for you, depending on what you're looking for. For example, if you're interested in vintage or handmade items, you might prefer to shop on Etsy. If you're looking for great deals on new or used items, you might prefer to shop on Amazon or eBay.
Do some research to figure out which type of ecommerce site is the best fit for you. Consider what you're looking for in a site, and then compare your options to find the one that offers what you need.