I think Wella Balsam was a huge success back in the seventies. Because they had a lot of advertising featuring some very famous girls, like Farrah and all those angels form Charlie.
This is a more recent add. Every single add back then had the exact same formula: one big picture, some words in big fonts, and like two or three paragraphs explaining very adult-like, the important stuff, the serious stuff.
And I just love it.