A forward in basketball is one of five player positions on a basketball team either referring to the small forward (SF) or the power forward (PF). Forwards are able to play both inside the paint and outside of it on offense and should be aggressive and rebound-minded on defense.
The small forward is a well-rounded player, typically being skilled in all areas of the game. They're athletic and athletically built, allowing for quickness and aggressiveness on defense. They also must be able to make shots from inside and outside of the paint and be able to drive towards the basket and create opportunities for their teammates in each play. Think of Kawhi Leonard or LeBron James, who are great on both sides of the court.
The power forward is like a mix of the center and the small forward, being tall and built, but also being a diverse player capable of shooting from the inside and outside of the paint, as well as a screen-setter and off-the-ball playmaker. Most power forwards are better at close range, but being a good 3-pointer shooter as well can be a real asset. Defensively, they are in charge of boxing out the offense and getting rebounds for their team. Anthony Davis or Breanna Stewart are good examples of great power forwards!