Strikers

Strikers or forwards are the players on a team in the area nearest to the opposing team's goal (penalty area) .The primary responsibility of strikers/forwards is to score goals.The main ability of this player must be his strength and heading. Unlike the typical forward, the striker doesn’t shift to the sides as much. He stays in the middle as a target man and will typically be marked by at least one player.He should be powerful and good in the air.

1 Centre forward (CF) The centre forward, has one main task: to score goals. Coaches will often field one striker who plays on the shoulder of the last opposing defender and another attacking forward who plays somewhat deeper and assists in creating goals as well as scoring. He is required to have some abilities like finding holes in the opposing defence and, sometimes, dribbling. In other cases, strikers will operate on the wings of the field and work their way goalwards.

2 Striker (ST)
There is a difference between a centre forward and a striker and these two roles are easily confused, although they do share similarities. A striker is better known for making runs to beat defenders, trying to beat the offside trap and playing close to the goal area. They are typically recognised as quick, with good reaction speed and given few defensive responsibilities. This contrasts with the centre forward's different style of holding up play and leading the front line.

3 Deep-lying forward also known as Withdrawn striker, It is roughly defined as a forward player with both goalscoring and creative abilities. the position itself is a loosely-defined one somewhere between the out-and-out striker and the midfield. Such a player is either a skilful, attack-minded midfielder or a striker who can both score and create opportunities for centre forwards. Attacking midfielders can also perform this role effectively.

Midfielders

Midfielders are players whose position of play is in the middle between the attacking strikers and the defenders. Their main duties are to maintain possession of the ball, taking the ball from defenders and feeding it to the strikers, as well as dispossessing opposing players. Most managers field at least one central midfielder with a marked task of breaking up opposition's attacks while the rest are more adept to creating goals or have equal responsibilities between attack and defence. Midfielders can be expected to cover many areas of a pitch, as at times they can be called back into defence or required to attack with the strikers.Many midfielders score goals sometimes more than strikers.A good midfielders should have great stamina to fit with this position. As we mentioned before there are certain positions related to midfielders which are:
1 Centre midfielder (CM)
2 Defensive midfielder (DM)
3 Attacking midfielder (AM)
4 Winger (RW/LW) or wide midfielder (LM/RM)
Now let's explain each one in detail;

1 Center / Attacking / Offensive /Defensive midfielder (CM) Central midfielders play several roles on the field of play. They are described as the orchestra conductors, the engines of the team, the players pulling the strings from the middle. They are the link between defence and attack, and must also defend when the opposite team are in possession. When his team does not have possession, the center midfielder is expected to drop back and pressure the ball. Their central position enables them to have an all-round view of the match, and as most of the action takes place in and around their area of the pitch, midfielders often exert the greatest degree of control over how a match is played. In offense the attacking midfielder should be in involved in the action by making runs towards the ball. Even before he gets it, he should already know where and how he wants to distribute it.

2 Winger (RW/LW) or wide midfielder (LM/RM) Wingers are commonly found in teams who play with three attackers. Traditionally, wingers are strictly attacking players who stay wide, dribble the ball forward and serve in crosses. Like all attacking players, wingers need to have 'off-the-ball' intelligence, by being able to read passes from the midfield that give them a clear crossing or scoring opportunity. Traditionally, right-footed players are played on the right wing and left-footed players on the left as a matter of familiarity and comfort. However, in the modern game, coaches usually demand wingers to be able to play on both flanks and to switch flanks during play regularly as a quick change of tactics.