DSLR is short for Digital Single Lens Reflex. Put simply, when you look through the viewfinder of DSLR or SLR film camera, the view you have is what you will see on the photograph you take.
With film cameras that are not SLRs however, like point and shoots and compact cameras, when you look through the viewfinder you’re always seeing the image slightly off center so that needs to be compensated for when composing the image. If you’re composing an image using the LCD screen of a digital compact camera WYSIWYG – What You See Is What You Get.
There are some wonderful DSLR cameras available and SLR used to be my favorite type of camera for taking quality photos. But they are on the heavy side so not easy to carry around all day. OK if you have transport and strong shoulders!