When the Internet was first introduced to the public it was used in government agencies and workplaces. It slowly expanded to private homes through the use of dial-up Internet connections, which worked but were slow and took long to load Web page text and images. High-speed connections such as DSL and cable have replaced dial-up in many home and business environments.
Web pages with only text load relatively fast regardless of speed but images take time to download to your computer in order to show on your screen. Slow bandwidth means you'll be sitting in front of your screen longer waiting for the images to load.
With the explosion of digital photography, many friends and family members show their images in digital format instead of through hard copy on social networking sites. If someone posts 100 pictures of their outing or vacation, you want to be able to scroll through them quickly. Slow bandwidth may have you waiting up to a minute or longer for each picture to load depending on its quality and overall size.
With video and movie sites allowing viewers to watch movies and videos from the comfort of their own home, slow bandwidth either cuts you out of the viewing market completely or means your viewing experience will be filled with skipping, stuttering and a negative viewing experience.
If you want to send information instead of receiving it, by uploading a video or picture, you need to have a decent bandwidth to upload it and still use your connection at the same time. If you have too little bandwidth and try to upload a large file it may time out and you may need to restart the upload process.