A modifier is a word or phrase that provides additional information about a noun. It can be an adjective, an adverb, a prepositional phrase, or a dependent clause.
Here are some examples:
* The *tall* building. (adjective modifier)
* The building *across the street*. (prepositional phrase modifier)
* The building *that was built last year*. (dependent clause modifier)
Modifiers help to make writing more specific, interesting, and informative.