It is a throw in given to the opposite team of those who kicked it out of bounds.
If it goes out on the endline or by the goal it's either a corner kick (kicked out by the defending team) or a goal kicked (kicked out by the attacking team)
In professional soccer when the ball goes outside of the lines it is out of bounds.
You cannot kick a soccer ball out of bounds and still play it. If the ball is kicked out of bounds you either do a throw in, corner kick, or goal kick, depending where you are on the field.
They throw it in.
A ball girl in soccer would get the ball when it goes out of bounds and will give it to either the coach - referee and/or put it by the goal post out of bounds so that when a ball goes out again the goalie can just grab the ball that is by the post.
when it passes the marked lines on the field.
a step kick is where you punt the ball out of bounds
Before, if the soccer ball went out of bounds, the first person to get to the ball obtained possession. This is why the sidelines are called the touchlines.
The ball has gone "in touch" and the restart is a throw-in.
a throw in, in soccer is awarded when the ball is out of bounds but only on the side lines