Assuming you are asking about the difference between travel baseball and Little League Baseball in the United States:
Little League is a nonprofit organization that provides opportunities for children to play organized baseball and softball. It is one of the largest youth sports organizations in the world, with over 2.4 million participants in more than 80 countries.
Travel baseball is not affiliated with Little League Baseball. Travel baseball teams are typically formed by parents and coaches who want their kids to compete at a higher level than what is offered through recreational leagues, such as Little League. These teams often require tryouts and players must pay to participate. Travel teams typically practice more often and play in tournaments throughout the year, which can require traveling out of state or even out of the country.