If you are applying to several different schools using one generic statement will be easily recognized and just as easily dismissed. WHY _ because you will be seen as not making an effort sell yourself to this particular school, low effort equals low interest to admissions representatives. Remember the admission committee will likely view thousands of these statements from qualified candidates and they will spot a weakness, flaw or lack of attention to the process in a heartbeat. What you don't want to do is give this committee an easy excuse to dismiss your statement and application.
Finally, review your statement and rephrase it again and again. If it exceeds the limit, summarize it and omit all unnecessary lines. Delete the repetitive sentences. Substitute high vocabulary with suitable synonym. Check for grammar and sentence formation. You can proof read the statement to correct any mistake or could make it re_check by your teacher. Do not plagiarize any thing. If you have taken any point from any where, refer it, because plagiarize software could detect and you might get rejection instantly on doing such crime. Do not add humor or use slang language. Try to use readable font size 12, Times New Roman and give line spacing of 1Ǒ after each line. Put your name and page number on each page. Submit your final draft and wait for the good response from the selection committee. Your hard working will surely help you to garner the best result.