I used to do keyword research with broad match. But my purpose is to get my web pages/posts/articles etc. ranked so exact match is best for SEO purposes, well I've heard.
Take this keyword:
Treatment for anxiety.. It has 110,000 monthly searches in broad match and 3,600 in exact match.
And another one, panic attack cures has 33,100 broad match and 2,400 in exact match.
And I have many more keywords like that...
I know the google keywoord tool is not 100% accurate, but the difference between broad and exact is extreme.
How come this happens?