Website indexing issues

[venkatweetz]

One of my website de-indexed without any prior notification, I don't know, what can i do now, How can i fix this issue

 

[Marc van Leeuwen]

Check quality of your posts on your website, if they are low quality then Google can ignore those pages and it is reason why your webpages are deindexed.
Also, Google updated some algorithms recently thus your websites can be impacted on it.

 

[Morda]

1)Poor guest posting.
2)Spam comments on blogs.
3)Participation in the exchange of links.
4)Content: duplicated, poor quality, auto-generated, copied