Yes, ‘here’ is considered an adverb. It is used to indicate a specific location in relation to the speaker or the context of the conversation.
In English grammar, adverbs typically modify verbs, adjectives, or other adverbs, and they often provide information about how, when, where, and to what degree something happens. ‘Here’ specifically answers the question of ‘where’ something is happening.
For example, in the sentence ‘Please come here.’, ‘here’ modifies the verb ‘come’ by specifying the location to which the action is directed. This makes it clear that the action should take place at the speaker’s current location.
Moreover, ‘here’ can also serve as a pronoun in some contexts, such as in ‘Here is the book you asked for.’ In both cases, though, its primary function remains that of an adverb, focusing on location.