RhinoFish - 3:13 pm on Dec 17, 2008 (gmt 0)
the use of separate ad groups with steering negs is analogous to stratified single ad group method, as long as your stratification is sufficient. what i really mean, is the triggering will be the same. but the net effect is to group the best performers in separate ad groups... so when you report higher ctr, are you volume averaging (weighted average) the numbers you're posting? my gut feel is that by separating the stats, they look higher, cuz all the shiny ones are in a group by themselves... but since scoring is on a keyword basis, if you undid your grouping mathematically, you'd see the same numbers on the individual keyword basis... another way to look at it is, the consumer doesn't know if your exact match keyword is in a separate exact only ad group, so it's ctr doesn't go up by itself... perhaps the seaprate ad group methid prevents you from making poor stratified bid decisions, which would make it superior for lots of folks i guess.