Whether you are writing a novel between classes or preparing a story for a workshop, revising the same scene several times can make it harder to see what is actually on the page. You know the conversation and expect the next sentence. That familiarity is useful while writing, but it can hide small repetitions and awkward turns of phrase. Hearing the draft through text to speech gives those same words a different way to reach you.
The voice does not know the sentence you intended to write. It works from the text you supplied. Sometimes that is enough to make a repeated word stand out, a long explanation feel longer, or a transition seem more abrupt than it did on screen. This is an additional editing pass, not a promise that a reader will find every error for you.
Listen to one scene before the whole manuscript
A useful first test is a scene you have recently finished, perhaps the one you plan to share with a campus writing group. It is long enough to hear rhythm and continuity, but short enough to revise without losing the thread. Choose a passage with dialogue and narration if possible. Those different textures give you more to notice than a page made up of only one kind of senten...