KWs that produce NO AdWords ads

[starboy]

When I search on a certain common word, I get organic search results as usual, but no AdWords ads. The word is a noun describing a common mechanical device. My own AdWords campaign uses it as a KW.

Under what search conditions would NO AdWords ads show?

[black]

if your ad has a low quality score (or a predicted low ctr / usefulness for the user) it will not be shown

[arieng]

This is an interesting phenomenon that I had thought would go away when Google replaced minimum bids with first page bids.

My understanding was that any active search words was eligible for display regardless of quality, but Google would estimate the bid that would be required to land on the first page. Obviously, this isn't always the case.

I'll try to identify some terms in my account that are experiencing something similar and see if I can get them to show by bumping the bid.

I'll be back...

[AdWordsAdvisor]

I posted some thoughts on this basic topic in another more recently active thread, without seeing this one first.

Here's that thread:

why is the first page bid high when noone is bidding?
[webmasterworld.com...]

AWA

[starboy]

Thanks AWA. My question was mostly about why there are NO AdWords ads showing for such a common word, rather than why it wasn't appearing for my own ad. It's such a common widely-used word I would think it HAS to be used as SOME advertiser's KW. Is it OK to post it here?