Use the glossary here on FTR, and look things up with google when you don't know what they are, a lot of terms are just so common that we abbreviate them, in this case, HH means Hand History.

You can view your HH on Bovada by going to the lobby, and clicking on ACCOUNT. Once the ACCOUNT window pulls up, you want to select the Hand History tab.

You can review hands at any time, but the hole cards will not be shown until 24 hours after the table is closed.

Also, the HH's don't last forever. I think 6 - 7 days or so. You can always download your HH's to have them forever, but they're just text files and there is no program that I know of that allows you to interact with the HH via GUI.