It's free to sign up & if you travel this can help reduce your costs!
From the website:
Being a valued member of the Hilton Family MVP program pays off. Just complete four qualifying stays or nine qualifying nights within the 90-day period of your choice and reach Gold VIP status faster than ever! (It normally takes 16 qualifying stays in a consecutive 12-month period). Exclusively for MVP Members. Offer valid at all U.S. Hilton®, Doubletree®, Embassy Suites Hotels® and Hilton Garden Inn® hotels and at select U.S. Hilton Grand Vacations Club® locations, Hampton Inn® and Hampton Inn & Suites® hotels.
Some Hilton properties are also offering double points on your stay and an additional 20% discount if you book with your Amex - promo code PBAMX1 I was able to "stack" the MVP with the AMEX promo and reduce one stay by $35 a night.