We bid on a lot of 'make / model' type keyword phrases in our industry. Many of them are NOT high volume search terms, however there is some traffic. We categorise these as long tail and hope to get a few clicks a month across all the engines. Google is not displaying our ads (or anyone elses for that matter) for many of these 'long tail terms' with the following as the ad diagnostic: "The keyword phrase that you have entered has a low search volume and is not showing any of your ads. If more users start searching for your keyword, your ad will begin to show. You do not need to do anything." All of our adgroups are very specific to the keyword (only 2 /3 keywords or tight variations per group and quality score is always 'great' on all groups). I know there is search volume in the other engines and via organic traffic and we are seeing visitors to our site on these terms and from outside of adwords - so why is google not displaying ads for them? It just appears strange that we are happy and willing to pay for the clicks but google will not show the ad. Have we just gone too far down the long tail? I am beginning to wonder if it is worth the time and effort to mine the long tail if the ads are not going to show. Anything we can do to help with this? Thanks