It says "Does He Know You". You see, many people claim to know Jesus but the important question is, does He know you?
If you go to the White House and stand outside the gate and tell the guard that you know the president, he probably won't let you in. But if the President comes out and says he knows you, they will let you in. That is the same thing the Bible says about Judgment Day.
"Not everyone who says to me, Lord, Lord, will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven. (Matt 7:21) The will of my Father is that none would perish and all would come to repentance. That is why God provided a way for us to be forgiven.
He sent His Son, Jesus, to come and die in our place, on the cross, for our sins. He then rose from the grave defeating death.
God (Acts 17:31) commands us to repent (to turn from sin) and to place our faith in Jesus, who alone is able to save us (Acts 4:12). That is the only way to be sure that He knows you on Judgment Day.