A path is a route that's meant for walking. You might follow a path up a mountain as you hike, or follow a winding path throughout your life.
Paths are often created by people's feet wearing a trail into the ground or through the snow, for example. You can also create a path by laying flat stones in line through a yard or around a garden. Another kind of path is the route something takes as it moves, like a speedboat's path in the water or, figuratively, the path your life takes as you grow older.