They made a difference.

Meaning: This means someone created or produced a noticeable or important change in something.

Choice of Words: Made means to create or produce something. Difference means a noticeable or important change in something. When you put them together, "Made a difference" means someone created or produced a noticeable or important change in something.

Alternative Expressions

Their actions had an effect.

Meaning: This sentence means that the group of people's actions caused a change or result.

Choice of Words: Their is a possessive adjective that refers to something belonging to the group of people. Actions are things that people do. Had is the past tense of have, which means to possess or own something. An is an indefinite article that refers to one or more things. Effect refers to the result or consequence of an action.

They left a mark on the world.

Meaning: This sentence means that the group of people had a significant impact or left a lasting impression on the world.

Choice of Words: They is used to refer to a group of people. Left is the past tense of leave, which means to go away from a place or to stop doing something. A is an indefinite article that refers to one or more things. Mark refers to a visible or tangible sign or indication of something. World refers to the planet Earth and everything on it.

Related Expressions