A buffer may refer to any of the following:
1. When referring to memory, a buffer is a temporary storage in the memory that stores information while processing other information.
2. Online buffering happens while streaming music and videos before they play. This form of buffering allows you to watch or listen to media almost instantly by downloading a portion of the file and then play it while the remainder of the file continues to download.
If your Internet connection is fast enough, you should only buffer for a few seconds when you first start playing the media and never need to buffer again. If your computer or device needs to buffer while playing frequently, your connection is not fast enough, or there is a problem with your connection or the streaming provider.