‘About’ is a preposition. Prepositions are words that link nouns, pronouns, or phrases to other words within a sentence, establishing relationships in terms of time, place, direction, or manner.
For example, in the sentence ‘She is talking about her plans,’ the word ‘about’ shows the relationship between ‘talking’ and ‘plans.’ It helps clarify what the subject is discussing. ‘About’ can also function in different ways, such as in phrases like ‘I thought about it,’ where it connects the thought to the subject.
In addition to being a preposition, ‘about’ can also be used as an adverb, as in the sentence ‘He walked about the room,’ indicating a general location or direction. However, its primary role is as a preposition.