What may cause a page not to be indexed (be de-indexed)?

[BeytzNet]

Hi All,

I have a main category page, a landing page, that does not appear in the SERPS at all (even if I serach for a whole sentence from it).

This page once ranked high.

What may cause such a punishment for a specific page?

Thanks

[OlegKorneitchouk]

Algorithmic penalty - duplicate content (page is copy of another page)

Algorithmic penalty - over optimization (too many backlinks with overoptimized anchor text)

Blocked robots - googlebot blocked via meta tag or robots.txt

Manually removed - URL was removed from index via GWT

[BeytzNet]

Thanks Oleg - it may be over optimization.

If you had a category landing page for Toshiba Laptops.
How would you have linked internally to actual laptops?

Would it be "Toshiba Laptop MODEL X", "Toshiba Laptop Model Y", ...

This is the case with me and I fear it causes the phrase "Toshiba Laptop" to appear dozens of times... - Over Optimization...

[jesse-landry]

I would be surprised if your internal anchor phrases knocked you out of the SERPs entirely.

Have you received a message in Google's Webmaster Tools?

[BeytzNet]

No.

But I have increased the number of products per page...

This may have caused it to appear as more stuffed, Over optimized?

If we would search "Toshiba Laptops" on the now it appears about 40 Times!!!...

[OlegKorneitchouk]

"Toshiba MODEL Laptop". I would like to them with the most descriptive & searched terms. I don't think its due to your internal linking structure unless its something really sketchy. You can PM me the link of the landing page and I can check it out if you like.