I'm an adwords advertiser for many years, in my account I've spent >500.000$ and I've a quite good confidence with adwords.
I've a strange problem with some keywords that don't appear in search results, or appear getting very few impressions.
At the moment I speak about an adgroup with only a single keyword in exact match (cpc 0.55€); its quality is 7/10; this month its CTR is 2.11% (not so bad) and average position is 7.3 (9.1 on google search and 5.3 on search partners).
The campaign budget is 2 times the daily spent (and google says it's ok); campain is set on Accelerated: Show ads as quickly as possible
This keyword has a much better CTR on search partners then on google search (2.67% vs 1.59%) - content network is disabled.
What happens is that if I search for my keyword I don't see in the search results (there are 6 pages with ads for this keyword), and the google diagnostic and analisys tools say that the keyword doesn't trigger any ad (but my ad is there, hasn't negative keywords and after all gets some impressions and clicks, 15000 impressions this month so far).
The landing page is highly relevant (it's in the first 5 positions of the organic results too)
Seems that this keyword get sometimes excluded from the auction, but I don't understand the reason/s. I wouldn't increase max cpc because it's already quite high for me and my industry (travel - hotel reservations)
I've the same problem for other keywords too where just for test I've set the max cpc to 2€ (more then 3 times the profit level) but they don't get impressions. I always speak about very targeted ads with few keywords in exact match
Campaigns are targeted on one of the main european languages and for all the (233) countries.
Have you any idea on what happens and how to solve?
Any suggestion is much appreciated.