First-Run Assistant (Identity): Eliminate "optional" sentence / more info about checkbox
ISSUE A: The sentence that begins "The 'optional' field" is not necessary. The user probably understands what "optional" means.
ISSUE B: The sentence next to the checkbox is vague. There could be more info, maybe. What users would want to uncheck the box and what would happen if they left it unchecked. Who would benefit from unchecking the box?