Safari is a web browser—an application that helps you find, view, and interact with webpages. Safari is designed to maximize your view of webpages, so you’ll find minimal controls, such as a scroll bar that appears only when it’s needed, and customizable toolbars that you can hide so more of the window is available for content.
Safari 4 includes new features that help you quickly find the websites you want, such as Top Sites and a full history search. History search uses Cover Flow to let you flip through full-page previews of the sites you visited in the past, so you can easily spot the one you want to revisit.
To find out what else is new in Safari 4, click this link: