Got soft rejected for mobile app UI template

I was upload my Mobile App UI Template
Main Preview image was 590x300 and others preview i was upload 12 Preview image (Size:3200x5700 px) .All screen was more than 170 Screen . I still confused why this item soft reject
what dose mean of “include as many pages as possible.” ? If any one got similar soft reject Please reply for Solution.

Soft Reject Reason:

Ensure all preview images are high-resolution and include as many pages as possible.
Advance Thanks