What does it mean that "the contents of paragraphs 2 and 3 in the specification are non-technical terms, and the applicant should delete them" in the notice of patent correction?

This means that these two paragraphs of yours are not technical content, either you have advertising content, which does not meet the writing requirements of the manual, or you have written something about what commercial effects will be brought in the future after the promotion. In short, they should not appear in the manual, so you can delete them. This paragraph number is assigned to you by the examiner according to your content, which generally refers to the second and third paragraphs.