Vancouver and Kelowna, British Columbia
Statement of purpose for University of British Columbia
The University of British Columbia runs graduate admissions through individual graduate programmes across two campuses, Vancouver and Okanagan. Thesis-based master's and doctoral admission at UBC is generally contingent on a faculty member agreeing to supervise, which makes the statement a document addressed to a specific person as much as to a committee.
Reviewed

What the statement has to argue at University of British Columbia
Write the fit section for the supervisor, not the university. At UBC a thesis-based application without an identified supervisor is frequently not competitive regardless of the applicant's grades, and the statement is where you demonstrate that you have read the person's work rather than their profile page.
Naming the campus matters more than applicants expect. Okanagan and Vancouver run different programmes with different research groups, and a statement that names the wrong one signals the application was assembled rather than written.
For course-based programmes the argument inverts: specific courses, practicums and the professional outcome you are aiming at, with research interest kept brief.
Questions about applying here
Do I need a supervisor before applying to UBC?
For thesis-based master's and doctoral programmes, effectively yes in most departments; admission usually depends on a faculty member agreeing to supervise and, where relevant, to fund you. Course-based master's programmes do not work this way and are admitted by committee against the programme's stated requirements.