There are a lot of variations, but the flick up is important.
Step 1: Roll the ball with your left foot to the right
Step 2: Flick the ball up with your right foot (without backspin)
Variation 2: The ball with your right foot towards yourself and a flick up
Variation 3: Flick up the ball without rolling it towards yourself
Variation 4: Roll the ball towards yourself and backward across your opponent
Flick up description: When you do a flick up, notice you do it with the front of your foot and your leg outstretched. Before you hit the ball keep your knee bent, but when you flick up the ball keep your leg (almost) outstretched.
Neymar Flick Tutorial Video