给你一段文本如下： 

The rise of e-commerce has altered the way we shop and the way businesses operate. With many physical stores closing their doors and online shopping growing in popularity, it's clear that e-commerce is here to stay. One advantage of e-commerce is the convenience it offers to consumers – they can shop from anywhere, at any time, without leaving their homes. Another advantage is the wide selection of products available online, making it easier to find exactly what you're looking for. This has created new opportunities for businesses, allowing them to reach a global market and operate without the limitations of physical storefronts. However, with the rise of e-commerce also comes increased competition and the need to stand out from the crowd. Businesses must invest in high-quality websites, effective marketing and excellent customer service to succeed in the online marketplace.，总结其中的关键词。
e-commerce, online shopping, convenience, selection, global market, competition, website, marketing, customer service.