Meaning of the word "Have an impact" in English

What does "Have an impact" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

Have an impact

US /hæv ən ˈɪmpækt/
UK /hæv ən ˈɪmpækt/

Idiom

to have a strong effect on someone or something

Example:
His speech really had an impact on the audience.
The new policy is expected to have a significant impact on the economy.