Many applicants wrongly believe that they should focus more on the personal statement than in the Work and Activities section, or vice versa. Both are essential parts of the application, and you want both sections to be solid and strong. Both of them provide crucial information about you, so take time to craft them.
However, one thing to keep in mind is that the Work and Activities section goes before the personal essay. Admission committees will read it first, so making a good impression earlier is essential as they keep assessing and considering your application.