ICQ is an instant messaging service that allows users to communicate through text, voice, and video messaging. It sends 400 million instant messages daily and offers communication features through its global community. ICQ is available in 19 languages and can be accessed through computers, mobile phones, and online portals. In the Czech Republic, ICQ has around 590,000 registered users, mainly teenagers, as it provides a faster communication method than email. Companies can use ICQ to save time and costs through fast, video-based communication and information sharing internally, though some employers dislike personal use on company accounts.