Hello Adwords exerts, Fairly new to Adwords, have only two campaigns running, with 4 ad groups each. My question is, after giving the campaigns some time to run, I have noticed that specific keywords within each ad group do much better than others. So, as an example, if I have 2 keywords in a specific ad group that has a CTR of say 5%, and the other 4 only have .8%, 1%, or whatever, should I lock down on the two and continue running the adgroup using only the high performing keyword? The way I look at it, why continue to run (and pay for) with the keywords that have a poor CTR. I hope this makes sense, and I hope someone can shed some light on this. Thanks!