I hope this is the right section. so im a total noob to this markting stuff, but i have decided to go with it. i have some very noob questions, please answer them - What is ROI? - What is lowest and maximum bid? how do i set it and how do i know ? what is it for anyway? - i will select keywords with this tool: hXXp://freekeywords.*wordtracker.*com/keyword-suggestion-tool.html is this right? - what is cpc? how do i set it up? - suppose i sign up with a coupon, can they expire, if they do what will happen of my campaigns. - what are long end keywords. thanks a lot.