Chromium updater for Windows

ChrUpdWin.cmd

@echo off
pushd "%~dp0"
if exist running exit
if "%PROCESSOR_ARCHITECTURE%" == "x86" set platform=Win
if "%PROCESSOR_ARCHITECTURE%" == "AMD64" set platform=Win_x64
if "%PROCESSOR_ARCHITEW6432%" == "AMD64" set platform=Win_x64
if "%platform%" == "" echo Supported only x86 and amd64 cpu architectures. & pause & exit
set channel=snapshots
set url=https://storage.googleapis.com/chromium-browser-%channel%/%platform%
set wget=wget.exe -N
type nul > running
if "%1" == "" (
	%wget% %url%/LAST_CHANGE || goto hell
	fc LAST_CHANGE LAST_INSTALLED && goto hell
	for /f %%i in (LAST_CHANGE) do %wget% %url%/%%i/mini_installer.exe || goto hell
) else %wget% %url%/%1/mini_installer.exe || goto hell
tasklist | find "chrome.exe" && goto hell
move /y LAST_CHANGE LAST_INSTALLED
echo Installing Chromium...
start /wait mini_installer.exe
:hell
del /q running LAST_CHANGE
pushd "%localappdata%\Chromium\Application\" && del /s /q chrome.7z & popd
popd

This batch file installs and updates Chromium on Windows.
You need Wget! You can download it here. Simply put wget.exe where ChrUpdWin.cmd is.
It is recommended to put batch file in a separate directory, because it overwrites running,mini_installer.exe,LAST_CHANGE,LAST_INSTALLED without prompt!

What's the purpose of appending "goto and/or hell" to lines 13-17/21 of this script?

What's the purpose of appending "goto and/or hell" to lines 13-17/21 of this script?

del running & popd