It's about a month that my website's (a forum for programming questions) Alexa rating is getting worse day by day, and every time that I look in Google Analytics, bounce rate is increasing and sessions and sessions duration are decreasing daily.
I should tell everything was alright until the last month. The number of users and their activity is like how it was in the past.
I checked backlinks from Google Webmaster. There are too many backlinks from pornographic websites (which are totally irrelevant from my website's field of activity). Does anyone have an idea about the problem and show me an answer?
(In my country unfortunately Alexa rating is very important for advertising agencies and they evaluate websites worth with Alexa rating.)