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You can browse the web to your heart's content via Wi-Fi or with your iPad's 3G connection (on Wi-Fi + 3G models.) The iPad has what many feel is the most capable mobile browsing experience available today. Web pages look very much like web pages on your computer. With the iPad's ability to zoom in, you don't even have to worry about the smaller screen size inhibiting your web browsing experience. In short, web browsing is a much more personal experience on the iPad.
You can browse in portrait or landscape mode, whichever you prefer. You can also quickly zoom into a video by double-tapping it or pinching open on it, which is natural to you because those are the motions to zoom in text and graphics.