Which Off page SEO factors to site going down?

Hi Expert !! Which Off page SEO factors to site going down? Actually my website going down and site have all the things ok like- on page and content.

Different link building strategies works for different websites we cannot say which SEO factors went wrong. Best thing is to make a perfect on page optimization and check your recent backlinks in Google webmaster tool and remove the bad links using Disavow tool and do some forum submission to get your rankings back.

bad content and not enough backlink. Or backlink from a low quality site

Black Hat SEO techniques such as cloaking, paid backlinks, keyword stuffing, duplicate content etc can lead you website ranking down.

Due to black hat SEO techniques your website ranking going down

1) Directory Submission
2) Irrelevant Keywords
3) Unnatural link building
4) Duplicate content

Directory submission.

Irrelevant Keywords and Duplicate content may be the factors of your website ranking going down.

Mostly people are ignoring No-follow links and giving more focus on getting do follow links. This is also a clear indication for Google that your link profile is not nuturall and you are just building links to manipluate SERPs. So better is try to get no-follow links also form relevant sites. I think in this way your website will perform better.

Black hat SEO Techniques only to site going down

The best off page activities to maintain your keyword ranking are:

Guest posting
Article submission
Press release submission
RSS submission
PDF submission
Social bookmarks
Classified ads
Infographics submission
Social networking