Mostly, they do it for branding and legal reasons. Particularly for trademarks, which can be lost if they become too generic. So they spend a lot of money to sp

Mostly, they do it for branding and legal reasons. Particularly for trademarks, which can be lost if they become too generic. So they spend a lot of money to spread the word that it's Kleenex brand tissue and a Google search, just in case it will help.