When a sentence is written in the passive voice, the subject of the sentence is being acted upon rather than doing the acting. For example, the sentence “The book was written by the child” is in the passive voice. The subject of the sentence (the book) is “receiving” the verb (to write). This sentence can be rewritten in the active voice as “The child wrote the book”.
While there’s nothing grammatically incorrect about passive voice, the active voice makes your writing stronger and more direct. As a general rule of thumb, try to minimize the amount of passive voice in your writing.
Note: This piece of Instant Feedback is intended as guidance to help improve your writing. It is not used as part of your Curiosity Score calculation, and if you disagree with the feedback it can safely be dismissed without impacting your score.