Google is abusing that word "cool" to mean mean generically "stuff I like" whereas typically, and particularly with teenagers who as a class are are especially concerned with impressing their peers , "cool" means stuff with social cachet. Synonyms for "cool" (according to a Google search) are "fashionable, stylish, chic, up-to-the-minute, sophisticated." Google is liked because it is reliable, has utility and is free not because it is any of those things.
What Google has is a popular product. What they are falsely claiming is that they have a "cool" product; Teenagers do not display Google branding to impress other teenagers like they wore "Calvin Klein" on the ass of their bluejeans when I was that age.
Generally, branding is no longer cool. Jimmy DiResta paints over the branding of his tools with white paint (or he did until DeWalt paid him not to), Casey Neistat carves the Ray-Ban logo off of his Ray-Bans. Brandlessness has been central to the Muji identity since its founding in 1979.