Thank you for replying.If a segment is defined at visitor level, it still bounded by the calendar correct?   If the calendar is selected as April, it only chose visitors who had credit applications in April but not the whole history.   

I created a segment of users who had credit application clicks using a visitor container.  I used the month of April as the panel date range.  And there're about 4 million users (unique visitor). When I added a day dimension there're about 160K unique visitor each day.  What does the 160K mean?   Ac...