The "download work mame plus 6000 roms extras deluxe" keyword is a fossil from the early 2010s. Using it will give you a slow, buggy, potentially dangerous emulator that lacks two console generations' worth of emulation improvements.
A "Deluxe" or "Extras" pack generally includes three distinct categories of data:
In the world of MAME, version numbers are critical. A set of "6000 ROMs" usually corresponds to a specific MAME version from the early-to-mid 2000s (likely MAME version 0.100 through 0.120).