What is a Thumbnail?

What is a thumbnail is a very common question with not a lot of on point answers.Imagine what would happen if those small icons and picture-like logos in your cell-phone go missing from your life. They are present in every application you use. It would become extremely difficult to maneuver and browse around if they were not there. Everywhere we go, we need to press those small colorful icons or have to click on a small logo or a picture as it holds meaning. Those small reduced sized pictures guide us and help us make decisions quickly. If you pay attention, you will observe they are present everywhere. From Youtube to Google, these small picture sized images make life easier for us. These small reduced size pictures are called thumbnails.