Digital vs Film

With film, you were limited to the number of photos you can take (maximum 36) and it also had to be developed, which can take time. During the photoshoot, you had no idea if the photos have come out well or if there was something wrong with the film until the last minute when it would be developed and you would have lost all your photos. It was also expensive.
With digital, you can see what you took on the camera screen and decide what you could do to improve. Providing you had a card reader, you could download onto your computer quickly and look at the pictures from there. While film is limited to 36 photos, SD cards can take 572 (sometimes more). Digital works instantly whereas film isn't and with computers and e-mails, you can send digital pictures to your client or colleague within minutes.
The major impact digital had with the photography industry was that it was quicker. Film needs to be sent away to be developed and then printed, meaning that it was expensive and took time. With digital, you just need to slot an SD card onto your computer and you could even print it from home or you could send the pictures to Boots or Snappy Snaps (or anywhere similar) and they can get it done within 1 to 24 hours.