An Internet Browser, or more commonly referred to as just a Browser is a service (typically free) used to browse the internet. The most popular browser is Chrome, Google's browser. Other popular ones include Microsoft's Internet Explorer, Mozilla's Firefox, Apple's Safari, and Opera. They are all free, and largely used.
Smartphones and tablets also require browsers to use the internet. Most of the larger browsers also have mobile versions, which are typically designed for a touch screen instead of the more precise mouse used on a desktop. Chrome, Opera, and Firefox all have smaller versions of their browsers to be used on mobile systems. There are also many mobile browsers that are not available on desktops. These include browsers such as Maxathon.