i have ad groups for each theme for example - time is a theme/feature of site. keywords are "quick red widget" "fast red widget" "urgent red widget".
if i put all those keywords into one ad group and create 3 ads for each word "quick", "fast" and "urgent" will Adwords understand the difference and show only "quick" ad for keywords like "quick red widget", "get quick red widget", "red widget quick solution"?
or
"quick" ad might show up for "urgent red widget", "fast red widget"... etc.
Should i create ad groups based on theme? or Should i create ad groups based on keywords?