PayPal, which was originally created in 1998 to be an online payment service It was later integrated with Elon Musk’s company for online banking. Around 2000, Amazon launched Alibaba Online, a market marketplace on the internet. Alibaba Online was financed with $25 million , and since then has became the most popular eCommerce website in the world. The year 2004 was the year that Google introduced Adwords that allowed online retailers to market their offerings to people who are searching online. It marked the beginning of the age of pay-per click, which has been a booming era.