guys my sits was on top with 10 keywords by adds ,press releases but suddenly keywords loss their position what is the cause,can i add some keywords in the title
Ads or Press Releases cannot give you permanent links! Though you do some permanent link-building method you will need to be consistent in order to get constant results!!
It is natural, google temperorily promotes newly raised websites but not for long. Keep on building up fresh content regularly and keen on posting ads. You will then attain permanent pagerank.
Not unusual at all. In many cases it is an indicator of where your site will rank again once it shows back up which could be hours days or in odd instances months. Just continue to build quality links create content and do some social bookmarking if your have not already done this.