Would it be possible to use only one keyword for an Adgroup?. (Ex: german shepard puppies for sale). I did a search for my related keyword using the traffic estimator, and it was estimated I'd get spot 3, and 2 or so clicks a day. I'm primarily selling/offering high end services, so, I wouldn't need that much traffic.
Yes, you don't have to have more than one line of keywords in your ad group. Note, though, that the keywords in your ad group correspond to search queries depending on your match type. You'll want to think about what kind of match types you want to use. In particular, make sure you understand the difference between broad matches and modified broad matches. See:
If you use any match types other than exact matches, check the search queries on a regular basis and make adjustments as needed. See: