Meaning of the word "key factor" in English

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

key factor

US /kiː ˈfæk.tər/
UK /kiː ˈfæk.tər/

Noun

a primary or most important element contributing to a result

Example:
Experience is a key factor in getting this job.
The weather was a key factor in the success of the outdoor event.