Xp means:
Experience.
You need a sorten amount of experience to level up in anything. (Class ranks, Reputation, Level)
You battle beasts.
report the bug
get a lot of xp like me im level 50
you just need to gain XP and level up for more quests. ^^
if you keep clicking where your hp and mp are, you can see how much more xp you need
One way is to buy an XP boost. Complete the part of your adventure that grants you your own Book of Lore. Then show it to the red moglin on the first page you come to(right outside of Battaleon town). He will then allow you to open a Store tab to buy the XP boost. Warning: it costs adventure coins, which you can only get from completing parts of your adventure.
Quest grinding is just doing all the quests that you come across. This is different that mob grinding in that you get more XP (experience) from doing quests because you get the added XP from the quest AND the xp from killing the mobs.
keep battling high level monster and keep doing quest that give you a lot on xp
You will simply respawn to wherever the respawn point is. You will not lose anything or xp. The monster you were battling will get all of its mana and/or hp back though.
for a non-member that's at least lvl 48 (to be safe) the dragon slayers quest (and you need 33 quest pts i think).18,000 strenghth xp and 18,000 attack xp.
You can earn xp by doing the cooking or cashier job
the easy way is go to travel map and press zorbaks hideout then press twilly vs zorbak then keep pressing continue or ok and fight drakath