When I do a search site:xxx.com I get around 80,000 results but when I go through the results it goes only up to page 51 (meaning 510 results) does this mean any penalty or supplemental or something?
There are results pertaining to xxx.com 80,000 time but only 51 pages of the site xxx.com is crawled in the index Hope this helps...
Can you clarify? I was under the impression that when I do site:xxx.com I get all the pages in the primary index (and to find pages in supplemental index I would have to add inurl:xxx.com to the query.) Also for example I did site:digitalpoint.com and I get 473,000 results, but when I browse the results it gets to page 100 (so 1000 results) so was with other large websites. So I am still confused by what all of that means. does not doing site:xxx.com get you the number of results in the primary index?
As long as I know, you can see the first 1000 results of a query, i.e first 100 pages. Can't tell more without knowing the URL.
This is not a sign of penalty. If your website has been penalized you would not expect to see a single page on your website being indexed. I have seen many websites including mind have this similar pattern. The more important you should pay attention is when your domain is not ranked #1 when you type its name in Google. That could be a sign of domain penalization or filtered.