Welcome to the Q&A Forum

The only seo benefit is that the can change the site programming technology for example from php move to asp or perl or another language without changing the url structure.

Consider this:

If they have url.php and after 1 year they decide to move to asp language then all url.php should be redirected to url.asp.

I think this is the reason, maybe they have a different!

Hi Dan,

Thank you for your quick reply.

For 3 months they were in 4th and 8th position. then from 1-2nd february they're gone.

the website is older than 3 years.  and yes the pages are indexed by google.

Hello,

Some pages of my clients website are removed from Google Index.

We were in top 10 position for some keywords but now I cannot find those pages neither in top 1000.

Any idea what to do in order to get these pages back?

thank you