diff --git a/Library/Homebrew/env_config.rb b/Library/Homebrew/env_config.rb
index d01571f0078065..311c5fe6cf8dbb 100644
--- a/Library/Homebrew/env_config.rb
+++ b/Library/Homebrew/env_config.rb
@@ -296,7 +296,7 @@ module EnvConfig
         default:      "#{ENV.fetch("HOMEBREW_USER_CONFIG_HOME")}/livecheck_watchlist.txt",
       },
       HOMEBREW_LOCK_CONTEXT:                     {
-        description: "If set, Homebrew will add this output as additional context for locking errors.",
+        description: "If set, Homebrew will add this output as additional context for locking errors. This is useful when running `brew` in the background.",
       },
       HOMEBREW_LOGS:                             {
         description:  "Use this directory to store log files.",