My Conversion is getting low.. PLEASE HELP!!

My website is medical-intl.com

I was always able to covert at 25-35% from SEO/SEM.

This few days conversion went horribly bad. All i did was to add about a hundred-odd words to some pages to facilitate in SEO ranking, I did not add in any words to critical pages. However, No leads since then. What could have gone wrong?

 

Maybe you can trace the problem back to the adding of the odd words.

 

Could possibly be because of the additional words. I agree--trace where the problem went from there.

 

Do you know which keywords you were ranking for? Perhaps you no longer rank for the keywords that were converting.

 

Actually I'm using adwords. when I looked at "search terms", all used search terms still looks appropriate.

But the latest update is this (and maybe a good sharing):

From the Adwords console, I excluded HP users long ago. Results where good until last week, when I posted this. However, I did not exclude tablet users. Last week, I noticed many visitors coming particularly from tablet. Now I reduce tablet to 0, and guess what? conversions improve DRASTICALLY.

Somehow traffic from HP and tablet users are the most expensive, but the conversion is also the least.