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.

Ver imagen Istredd
Ver imagen Istredd

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.