I know this isn't relevant for most people here who have their own status, but for those who visit here this may come in use.
I can book rooms for you at any of the brands that belong to the Hotel Chains above and you can usually benefit from the elite status. Most significantly complimentary room upgrades depending on availability upon check-in. Though, in my experience, the front desk will usually confirm the upgrade beforehand if available.
For Hilton you may get free breakfast as well. Another useful benefit would be if you need a room in a specific hotel that is fully booked you will be able to get a room through me.
For a full list of benefits, visit the respective chains website.