Soccer consists of two-45 minute halves, during which the game clock continuously counts up, also known as a running clock.
Although there are no timeouts, referees can add injury time based on the stoppages during a game. If that's not enough to decide a game, there can be extra time which is essentially overtime. Some tournaments may also use aggregate scoring or the away goals rule to determine a winner.
That's a lot of scoring! Goals are scored by kicking, heading and moving the ball into the opponent's goal with anything but the player's hands. While the most unlucky can score an "own goal," typically, it's the team on offense trying to score by taking a shot or heading/chesting the ball towards the net. With a late equalizer, or goal to even a score, a game may end in a draw.