What does a forward do in soccer?

Answer 1

A forward, as the name implies, plays in the forward third of the pitch, focusing on attack.
Wing-forwards try to participate in defensive duties by tracking back to harrass the opposing wing-back in his attempts to support the opposing attack. The WF's attacking duties are to lob or drill crosses to the CF, or move into the box to overload the opposing centre-backs or try to take long-shots.
Centre-forwards (strikers) participate in defense in set pieces (forming the wall or in the box for aerial play) or during corners (for aerial play). Wing-forwards tend to use their speed to become target-men for counter-attacks.

Answer 2

The job of a forward is to score goals.