As my experience, with Google adwords I realized that the cost of keywords to be very expensive even for very niche words, mostly $1.00 and above, I got clicks but no more people went onto purchase. You can spend around $3000 monthly if you want to promote your products. Facebook, offering low price but excellent targeting options, being able to set a daily budget where the ad stops running when this is reached is your goals, also being able to set a start and end date is great. In summary Facebook is the way to go for paid advertising and Google ad is just when you have a good fund then effective. So, what is your thought when choosing between Google Adwords and Facebook Ads, which is effective for you?