Hello I'm quite confused I don't see the difference between Marketing and sales cloud ! well I know that you have to market in order to sell. I know sales cloud help us in whole process of selling from campain to the actual sell!so is marketing cloud a part of sales cloud or do we have to separate them ?because concerning the certifications there is only Sales and service cloud ...no marketing obviously ???My english is terrible sorry for that but if someone catch the point I wanna get across I'll be glad :)thank you in advance