Vim What?Commands[
[

The [ command in Vim

Motion

prev section

Prefix for backward navigation. [[ prev section, [( prev unmatched (, [{ prev unmatched {, [m prev method start, [/ prev comment start.
Examples
Related plugin

tpope/vim-unimpaired — [b/]b prev/next buffer, [q/]q quickfix, [l/]l location list, [/] add blank line, [e/]e exchange line up/down, [p/]p paste above with indent.

Reference

Official Vim help for [

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Related motions