What do you mean by that?
It's a nonessential word, clause, or sentence added to an already grammatically complete sentence. It's most commonly set off by brackets, but it can also be set off by commas or dashes.
Example:
My mother went to the supermarket and picked up some strawberries (my favorite fruit) earlier today.
Review some basic grammar in these instructional pages on the main parts of speech, ... or noun phrase to show direction, time, place, location, spatial relationships, or to ... Some examples of prepositions are words like "in," "at," "on," "of," and "to. ... to minimize the prepositional phrases and bring clarity to the writer's intent:.
Missing: Cite | Must include: Cite