Conditionally execute a command several times. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/for.
for %variable in (item_a item_b item_c) do (echo Loop is executed)
for /l %variable in (from, step, to) do (echo Loop is executed)
for %variable in (path\to\file1.ext path\to\file2.ext ...) do (echo Loop is executed)
for /d %variable in (path\to\directory1.ext path\to\directory2.ext ...) do (echo Loop is executed)
for /d %variable in (*) do (if exist %variable echo Loop is executed)