i have a very successful site, and i have identified a NICHE (very unique one) which i used to completely dominate before i made some changes and messed up the on page seo.
I have tried to revert back the changes but since then i have noticed that, there is a tendency that some pages rank and some dont,....... although the page which doesnt rank hardly has any worthy competition available but still the page doesnt rank, meanwhile similar pages in the niche rank on 1st page for the respective keyword........
could anybody help me with why would a page rank in its niche while the other wouldn't?