Online ads are promotional messages displayed on the internet, designed to reach potential customers. They can appear on websites, social media platforms, and search engines. Advertisers use various formats, such as banners, videos, and sponsored posts, to capture users' attention and encourage them to click for more information. These ads are often targeted based on user behavior, interests, and demographics, making them more relevant to individual viewers. Companies like Google and Facebook offer tools for businesses to create and manage their online advertising campaigns, helping them track performance and optimize their strategies for better results.