Back to your original statement. Your question is not dumb by a longshot. Many, many advertisers have no idea about the different matching types and how to use them. The fact that you're even aware of them shows you've taken some of your time to do that invaluable research.
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I'm going to branch away from the veryreasonable advice that you received about how people use all match types for the same words/phrases to gauge performance. BTW, never use a 1 word phrase match - think about that one :)
My question has been touched on today tangentially by a couple of posters and I've never gotten a definitive answer for it. I think each time I brought it up, I complicated the scenario to such a point that it didn't invite a yes or no response.
Here goes:
It has been said, just recently too by AWA, that a broad or phrase match will generally start out as exact until it "proves" itself in the context of an exact match before it is tried out with other keywords.
Now if one uses all 3 match types on the same keyword/phrase won't the exact match pick up all the searches? If so, the broad version will never get a chance to accrue impressions/clicks.
The only two reasons I can think of why this would not be true is:
I'd love to get a verification on these since we know there are advertisers who will show on widget asdf where others won't broad match widget on a search for a widget
The first scenario I suggest may be the less desirable because advertisers like myself often advertise keywords that no one else is likely to ever use, thereby giving me no chance to broaden the match if I use more than one match type.
I recall when I first started in AdWords, I could do elegant things with phrase match like "using widgets" and they would automatically match queries with any manner of modifier on the beginning or the end. Even though no one would search on precisely that (admittedly poor) example, all sorts of sentence like queries might contain it.
Darn, still didn't explain it simply :)
patient2all
It has been said, just recently too by AWA, that a broad or phrase match will generally start out as exact until it "proves" itself in the context of an exact match before it is tried out with other keywords.
To be accurate, I didn't actually say that recently. (At least that I recall.) ;)
What I said is that the AdWords system is designed to show ads for any variations of broad and "phrase match" keywords that are predicted to be relevant to the user. (But it is not designed to show ads for any and all variations, regardless or relevance, simply because they are a variation.)
At one time the system did work essentially as patient2all described it. Currently, however, AdWords will show you right away for all variations which are predicted to be relevant.
And, as mentioned previously, if there's variation which one would like to show on, but is not currently showing on - it's best to add that as a keyword in its own right.
AWA