A camera’s built-in LCD screen is great for reviewing a shot you just took. But the screen is so tiny that it’s often hard to tell whether the photo is in sharp focus.
Most cameras allow you to zoom in on a photo while displaying it. I like to zoom in and verify that my photo isn’t blurred—especially if the subject is still in front of me and I have another chance.
If your camera has an electronic viewfinder, it can be a superior alternative to the LCD screen for reviewing your shots, especially in bright light.