My wife works at a high school in Germany. I recently noticed that it's extremely hard to find that school's homepage using Google. I looked at the source code of the page and I believe I've found the reason: There are two
<meta name="robots"> tags; one is
<meta name="robots" content="all">
and the second one, further down in the page, is
<meta name="robots" content="noindex, follow">
My guess is that the second one trumps the first and keeps Google from indexing the site. Am I right? I wouldn't want to tell the webmaster that I've found the problem and make an idiot of myself (because I don't really know anything about how to build a proper webpage, let alone do SEO).
By the way, if you happen to find any other goofs on the site, I would be glad if you could report them. My next candidate would be the utter lack of relevant
meta tags that convey information about the page's content.