Question: then why do they use it in most of the answers "lol"? does it refare to something? 

Answer: Lack Of Love Community \nLacking Of Life Miscellaneous->Funnies \nLame Old Loser Miscellaneous->Funnies \nLand Of Legends Community->Sports \nLaugh Out Loud Internet->Chat\nComputing->SMS \nLaughing Out Loud Internet->Chat \nLaughs Out Loud Internet->Chat \nLemon Or Lime Miscellaneous->Food \nLevel Of Learning Community->Educational \nLife Of Loan Business->General \nLight Of Love Community->Religion \nLightning Over Love Miscellaneous->Funnies \nLittle Old Ladies Internet->Chat \nLittle Old Lady Miscellaneous->Funnies \nLoads Of Laughs Miscellaneous->Funnies \nLook Out For Loonies Community->Law \nLooking On Line Internet->Chat \nLooking Over Liam Internet->Chat \nLoss Of Legs Medical->Physiology \nLots Of Laugh Business->AMEX Symbols \nLots Of Laughs\nLots Of Luck \nLots of Laughter\nLots of Love
This question from the Yahoo Q&A forum is categorized in the topic: Family & Relationships