Have you ever heard someone say 'we need to hit the ground running?' You might have heard it in a meeting or a presentation, or when someone was discussing a project they were about to begin.
To 'hit the ground running' means that you start off strong to get ahead. Like in a race, if you hit the ground running, you can get ahead of the competition. Hitting the ground running has a similar meaning to 'getting off to a good start'.