So, I just finished reading the "Google Adwords Made Easy" e-book by Brad Callen, and I'm a little confused about the R/S ratio formula. Does the R/S ratio matter when using Adsense, or does it only matter with Adwords?..And, does the Google KW Tool automatically calculate the R/S ratio automatically, or after searching for a keyword with it (say I search for "gardening" with the KW tool, and then sub keywords such as Gardening tools, Childs gardening, etc), do I still need to calculate it manually, even though the keywords I'd be going for are low in competition and have a monthly search of about 1,000 or so?.. Brad did give instructions on how to do it manually (as Keyword Elite in the example automatically did this for him)..I'm just confused if I have to do it at all if I'm using Adsense. This is my first time even hearing about it, so, I just don't know how important it is. (I'm a complete newb when it comes to KW research)