Which innovation was FIRST introduced to streamline e-commerce checkout processes, significantly reducing cart abandonment rates?

The final step in an online purchase journey has undergone significant transformation over the years. Checkout optimization remains one of the most critical factors affecting conversion rates, with studies showing that nearly 70% of online shopping carts are abandoned before completion. This trivia question explores how leading e-commerce platforms have innovated to solve this persistent challenge. Test your knowledge about the technologies that have revolutionized how consumers complete their online purchases!

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One-click purchasing (patented by Amazon in 1999)
Digital wallets (like PayPal's Express Checkout)
Buy Now, Pay Later services (like Klarna)
Social commerce direct checkout (purchasing within social media platforms)