Online advertising refers to the practice of promoting products, services, or brands through various digital channels on the internet. This can include display ads, social media ads, search engine marketing, and other forms of digital marketing. The goal of online advertising is to reach a targeted audience and drive traffic, leads, or sales for a business. With the rise of technology and the widespread use of the internet, online advertising has become an essential tool for businesses to reach and engage with potential customers in a cost-effective and measurable way.