What exactly is mark of the beast? i know it is ...

The marking of the beast,(666).really is symbolic.It basiclymeans anyone who knows who Jesus Christ is, but do not believe, that he is the son of God,who came to take away the sins of the world by dying,and being the greatest sacrifice ever,for our sins.To put it in a simpler way. Who ever is comformed to this world,and not willing to believe,and put their trust in Jesus Christ, has the mark of the beast.Gods number is 7(mark of a true believer of Jesus Christ.) I could go on & on but,if you really want to understand,you have to read the bible. A good place to start is in the book of Mathew.I hope I have answered your guestion,I say all this humblly and I am paraphrasing,so,this is what I understand it to mean.I know when I read my bible,I don't understand alot of it,but if I ask God for wisdom,and believe,he opens my eyes.Sorry for the long letter! I would love to talk -(write) share/&learn with you. Thanx.From Maintrx

"The Apocalypse of St. John the Apostle"  Also called "The Book of Revelations"   Chapter 13  verses 16 & 17   "And it will cause all, the small and the great, and the rich and the poor, and the free and the bond, to have a mark on their right hand or on their foreheads, and it will bring it about that no one may be able to buy or sell, except him who has the mark, either the name of the beast or the number of its name."

There are many people with many explanations for what this means.  I think you should read the whole thing for yourself and figure out what it means to you. 

As far as I understand,  the mark of the beast is a physical sign on the forehead or right arm, that marks people as worshippers of satan. Supposedly satan will trick people and gain control of commerce (or something) and only pople who worship him will be allowed to trade goods. They will be recognized by the mark on their forehead or arm.

You don't need to worry.  Learn everything you can, be a good person, love people as much as you can, and trust that when you stand up to evil and fail, you did the right thing.