Basic gameplay rules require the player to swing the bat in order to hit the ball.
When the ball flies over the fence, it will be considered a Home Run.
Hitting as many home runs as you can is the primary strategic objective in the game.

[No matter how hard I try, I can't seem to hit a Home Run]
Each stadium in the game will progressively get larger as you move up and will feature a different range of pitchers.
Both will affect your ability to get the ball flung out far enough to go over the fence.
Increasing your batter's stats will help you get more distance out of the ball, which in turn will result in more home runs.

Batter stats can be increased by upgrading your batter and equipped gear cards.