Alt Holo is the cheap way of guarenteeing a Holo in every booster. It's just a regular card with the set symbol in the pic an a sort of shine in the picture.
Reverse Holo is a special holo where the card, rather than the picture, is shiny.
"Gold Lettering" is the previous version of Reverse Holo.
Keep in mind that this has no meaning to anyone who uses it for play. They have no supriority towards normal versions. Though it shows off a bit of whatever.