“The early bird catches the worm” is an idiom that means being prompt and proactive will lead to success or advantage. It emphasizes the importance of starting early or acting quickly to seize opportunities before others do. Essentially, those who take action first are more likely to achieve their goals or get the best results. 

The phrase originated in the 17th century and highlights the benefits of being punctual and taking initiative. According to Missouri State University, it’s a common saying that is even shortened to “early bird” sometimes, as in “early bird specials” at restaurants.