MOUTAZALNABILSY Thank you for confirming this, I have taken a look at your Big data analytics landing pages report and compared the date range from there to the current time period to the previous dates.
From this we can see that the drop off in traffic is coming from 4 main pages on your site and the other pages have grown in traffic.
At this same time period Google was rolling out a number of changes to the SERP results. Please can you confirm if you track your keyword position and saw a drop off in position around this time? many thanks