I have come across the problem where a page on my site does not come (in a Google Search) up unless you click to view omitted sites . What causes a site to become omitted? The page previously came up, but now it has been replaced by a page that is a .pdf. Please respond as to why page becomes omitted and what I can do to make it reappear.
Omitted page are similar page to one that is already shown, so Google omit it. If you think it is the PDF file that google thought is similar to the one that has been omitted. Simply remove it from Google. The google remobe URL tool should remove a file in index easily and painlessly.
I agree. You could start rearranging text and stuff, but if you have substantially similar HTML and PDF documents, consider moving the PDFs into a /pdf subdirectory and having robots.txt not index them.