This data shows the total number of pins, impressions, engagement, clicks, and saves.
Shows the total number of total pins for the selected period.
Shows the number of times your Pins or ads were shown on screen.
Shows the total number of engagements on your Pins. This includes saves, Pin clicks, outbound clicks, carousel card swipes, secondary creative (collections) clicks and Idea Pin forward/backward swipes.
Shows the total number of clicks on your Pin or ad to content on or off of Pinterest.
Shows the number of times people saved your video Pin to a board.
Check out this article for more information on Pinterest Analytics.