* Verb: This is the most common usage. It means to help or encourage the development or success of something.
* Example: "The company will promote its new product with a large advertising campaign."
* Noun: This is less common, but it refers to the act of promoting something.
* Example: "The new employee received a promote to a management position."
So, to determine the part of speech, you need to look at how the word is used in the specific sentence.