The Publishing section shows graph with daily breakdown of how many posts you have published in a given period. Hovering mouse over the graph will reveal how many posts (and what types) you have published for each day. Available types are:
status
posts with link (URL)
posts with image
posts with video
Below the graph you'll find the totals for each type of post.
The percentage represents the percentage change (growth or decline) of the number of published posts compared to the previous period of the same length.
Note: This report shows "standard" posts only - it does not include unpublished posts nor ad posts.