Definition – What does Buffer mean?
A buffer is a temporary data holding area that stored for a short amount of time, just like RAM. The main purposes of this term are hold data right before it is used. I.e., when a user downloads audio or video file from the internet, it may load the first 20% of it into the buffer and then begin to play. While the file playback, the PC continually download the rest of the clip and stores in the buffer.
Glossary Web explains Buffer
The buffer is also used in several another area in computing to enhance computer performance. Most hard disk drives use a buffer in order to enable more efficient access to the data on the disk. Graphics cards send images to the buffer before they are displayed on the screen. Computer programs also use a buffer to store data while they are running, if it were not for buffers, computers would run a lot less efficiently.