1x or 5x ?

[prattdog69]

I see people show servers that have that in there. What does that mean?

[skullatbash]

it refers to Exp rate of that Realm.

For more info:
[tbc] Medivh: x1 ( no gear shop and buffed bosses)
[tbc] Outland: x5 experience, x1 gold rate, weapon skills, profession and reputation rates
[wotlk] Lordaeron: x1 ( no gear shop and buffed bosses)
[wotlk] Icecrown: x7 experience, x3 gold rate, weapon skills, profession and reputation rates
[wotlk] Blackrock: Instant 80 (only PvP)
[cata] Neltharion: x7 experience, x3 gold rate, weapon skills, profession and reputation rates
[mop] Frostwolf: x7 experience, x3 gold rate, weapon skills, profession and reputation rates