Top Pages reports presents all pages that rank for at least one search query associated with your seed keyword.
Organic Keywords (1) — keywords a page is ranking for in Top 100 search results
FB shares (2)— the number of Facebook shares received by the page
Linkedin shares (3) — the number of Linkedin shares received by the page
Google+ shares (4) — the number of Google+ shares received by the page
Potential Traffic (5) — the number of monthly visitors a page could have received additionally if it had gotten to the fist position for all keywords currently ranked for in Top 20 search results.