I have a matrimonial site .My site was on first page of Google on "sanjog se" and "sanjogse" keywords. but yesterday my homepage ranking suddenly dropped from first page to nowhere . Now i don't know what to do . please help me for getting my ranking again quickly. i can't understand the problem .
Google has done it to alot of sites and the only thing you can do is write good content and hope it comes back. If you had alot of single links on different sites that may have had something to do with it. Just getting a link on a site is not going to work anymore you have to have the link inside some content like a article you wrote.
You can't do anything about the update and sudden changes of your keyword ranking. You may have messed with some link building stuff and that's why google down rank your website. In such situation you can only create quality backlinks for your site, diswow the useless backlinks and create quality content which will help your site to get ranking back in SERP.
I think most of us are facing this problem. My site also goes down and I am concentrating on my website content and links. One of the important problems are that my competitors are still ranking good on google. And now I am more concentrating on my competitors backlinks.