E-marketing refers to marketing products and services using electronic media and the internet. It allows companies to connect with consumers globally in inexpensive ways like websites, banner ads, and social media. Some key benefits of e-marketing include lower costs than traditional marketing, the ability to target large audiences, and its interactive and measurable nature. However, limitations include possible scams, an inability to physically see products, and technology issues like slow connections. Popular online shopping sites in India that receive high customer ratings include Flipkart, eBay, Tradus, and Futurebazaar. E-marketing is expected to continue growing significantly in the coming years.