The representation of a file loaded into memory. Edits are performed on buffers.

This tag is for questions about interacting with Vim's buffers.

From :help windows-intro

A buffer is the in-memory text of a file

...

A buffer is a file loaded into memory for editing. The original file remains unchanged until you write the buffer to the file.

For questions about Vim windows (the "viewport" onto a buffer) see .

Buffers and windows are coupled topics. For more information about both, see :help windows.txt