We created over 5 lac pages over the last 4 months of which bulk of the pages were created for a particular category (we are a horizontal portal with listings across multiple categories). The category in which we created about 4 lac new pages has had a dramatic fall in traffic. The fall is over 50% in the last 20 days. All data on these pages is genuine and is not available on any other site.
Any help to identify the possible reason for the fall would be highly appreciated.