E-marketing (which is short for "electronic marketing") is a way of selling things over the internet. It uses websites, emails, and social media to reach potential customers and let them know about products or services they might be interested in. Companies can use e-marketing to send information directly to people and show them what they offer, so they can decide if they want to buy something. It can be used to sell products - like a new phone or pair of shoes - or services - like web hosting or advertising.