When you're in ORPAS there's info under the personal submissions:
Western University - Statement of Intent (maximum 3,000 characters)
The Statement of Intent should include the following points, with particular emphasis on a, b, c, and d (e only if applicable):
explain reasons for choosing speech-language pathology as a career
highlight specific personal attributes that you bring to the profession
emphasize academic and non-academic accomplishments;
outline reasons for entering the Master's program at Western University; and
if you have any irregularities in your application, please explain.