Why is my page's location in the Google search results lower than before? 3 months ago the site was in Top 10 and from yesterday totaly dop to 41-50 What can be the problem ?? it is a PR5 site http://www.tourism-bulgaria.com and PR is still 5 I have about 30 new pages with similar meta description, could be this the problem, or google see this as duplicate content may be?? How often Google change the SERPs ? Can i a have again TOP 10 SERPs with modified page content , titles, description etc.?
The SERPs change daily. Large changes like that are unfortunate, but not uncommon. Sometimes they will come back on their own. Sometimes it takes work. Good luck.
You should make sure the titles and meta tags are different from each page. Have you changed anything else? How many links does your site have compared to ones above it?
When every single page of my site apears lower than before what can be the problem, change in algorithm, low backlinks or google sees duplicate content?