When you share your pictures with others, it’s important to reduce file size no one should have to wait hours to download your photos. It’s also important to reduce the dimensions of your photographs so others can view them easily.
Most computer monitors are still set to 800 x 600. Therefore, to allow most people to view your images without scrolling, you need to reduce the size of your photo to at least 800 x 600, but it’s even safer if you go down to 640 x 480 or less. Resampling the photo will also reduce the file size considerably, making your photos quicker to download.