Keywords listings disappeared from searp

I have had great listing in Google for a few of our important keywords
for a few months now - now all listing have been disappeared from serp.

At this point we are at a complete loss as to why and how it can be
fixed.

 

Have you changed anything like the titles or have potential duplicate content issues?

 

yes i have various keywords back 2-3 page

 

thanks for the feedback...........

 

I think you have stop working on those competitive keywords or because of google penalize your website for those keywords but this is at very rare situation . Just keep working on those keywords I hope you will get your keyword back to that postion where they are previous.

 

thanks for your reply