Website Traffic going down dramatically from average 15000 visitors per day to 2500 visitors per day?

[Tommy]

Hi Ahmad,

Have you done anything to your website during the week your traffic went down? If you did something to your website, then that might be a reason why your traffic went down and your ranking on keywords went down. Furthermore, did you ever used any black hat SEO tactics to boost your ranking such as buying links? Google might've caught that and penalized your website. (I am only guessing here).

I would suggest you to check Google Webmasters and see if Google sent you any messages regarding to your website. If you violated any of the rules, Google will usually notify you via Webmasters.

Furthermore, if you did something to your website during the past week, double check on that to see if that is the reason why your ranking went down.

Have you been posting new content lately to keep your website "Fresh?" Do you have some bad links linking to your website?

Google Webmaster should be able to help.