Respuesta :
Thumbnails are mini images (even small pages or videos) placed on a computer screen.
The purpose of them is to help to organize and recognize them. Another purpose of a thumbnail image on a web page is to reduce bandwidth and download time.
Some examples attached.


ANSWER:
Thumbnails are reduced-size versions of pictures or videos
EXPLANATION:
Thumbnails are decreased size renditions of pictures or recordings, used to help in perceiving and sorting out them, serving indistinguishable job for pictures from a typical content list improves the situation the words Another motivation behind a thumbnail picture on a website page is to lessen data transmission and download time.