Standing on the shoulders of giants

Standing on the shoulders of giants means getting help from those who have achieved something or done something that is great. For example, when a scientist comes up with an idea that helps other scientists do their work better, they are standing on the shoulders of giants because they are using the ideas of others to make their own idea better. It's like when someone stands on a giant's shoulders, they can see farther and learn more than if they tried to do it on their own.