What is the biggest online store in Saudi Arabia?

Could you please elaborate on the question, "What is the biggest online store in Saudi Arabia?" I'm particularly interested in knowing about the scale of operations, the range of products available, and maybe even a bit about its popularity or market share. I'm also curious about any unique features or services that this online store might offer that distinguish it from its competitors. Finally, I'd like to understand what makes it stand out as the biggest online store in Saudi Arabia. Could you provide some insights into these aspects?