And the meaning of the sentence is changed completely.

Consider the following sentence from a newspaper website

“… were given responsibilities to overlook everything in their areas …”

Notice something? No? The correct word should have been ‘oversee’ rather than ‘overlook’. Oversee means something very different from ‘overlook’. Let us read the sentence once again, post the correction

“… were given responsibilities to oversee everything in their areas …”

Now read both sentences and how they mean totally different things. All because of one word.