No, I'm sure you're not stupid - actually, I don't know that for a fact, but you probably aren't :)
The "broad match" rules have become quite complicated and confusing of late. The most recent "theory" is that essentially all your broad match words start out as "exact match" and need to prove themselves that way before they'll match to other terms (expanded broad match - synomyns, etc) or other qualifiers along with your search term.
I have found that on a long established highly successful campaign, I get a lot of leverage on what other searches my keyword will show for. However on a new campaign/adgroup with brand new keywords, never used, the keyword "red widget" won't necessarily show on a search for a red widget. However it might.
The most recent statement made by AWA on the subject is quoted here:
...the essential intent (and function) of broad and phrase matching is to show your ads for as many variations as possible, so long as those variations deliver relevant ads to Google users.However, broad and phrase match are not meant to be a guarantee that one will appear for any and all variations of a keyword, regardless of whether or not they'd deliver relevant ads to Google users.
You can find it and the discussion leading up to it here:
[webmasterworld.com...]
It would be nice if the matching options worked as described in the AdWords Help. Simply put, they do not. At this point, unless a voluminous clarification is published, it's rather hit or miss which searches your real estate will appear for. Much a matter of luck as much as anything else based on my considerable testing.
The AdWords help is woefully outdated and oversimplified and you'll gain more insight reading here and by your own experience.
Good Luck,
patient2all
Ok Go to google and search
Real Estate Wacko
There you will see just one ad from real-etate.com
No matter what weird tearm you type after real estate that persons ad comes up. And its 90% of the time just his.
Do you know how he does that and no one else is doing it?
Thanks a bunch!
Kevin