What does the red mean?

[v0031]

5.   Barbie doll’s first pet was a horse named Dancer
6.   Barbie doll’s signature color is Barbie™ Pink (PMS 219)
7.   Barbie doll stands 11.5 inches tall
8.   The best-selling Barbie doll ever was 1992 Totally Hair™ doll, with hair from the top of her head to her toes
9.   The Holiday Barbie™ Doll continues to be the number one selling Barbie doll year after year. In 2013 the annual collectible line celebrated its 25th anniversary
10.   Barbie doll has had 150+ inspirational careers
11.   Barbie recently announced she will be celebrating women in business with her new role as entrepreneur
12.   Barbie first broke through the plastic ceiling as a business executive in 198513.   Barbie traveled into space in 1965, four years before man walked on the moon
14.   Although she has never won an election, Barbie has run for president 6 times since  1992
15.   Barbie has been a muse to many artists over the past 5+ decades – including Andy Warhol and Peter Max

[angus]

a metaphor for achieving previously unattainable goals.  

Glass is transparent in the visible region of the Emag spectrum, so it's "unseeable."  Ceilings are walls at the top that you can't penetrate.  Put together, a "glass ceiling" is a barrier above you that you cannot see, but cannot penetrate.  If you can break through it, you have achieved a new kind of success.  Barbie, apparently, did this.  My guess is that it refers to the fact that as early as 1985 she rose to a position of power in a private company that no woman had risen to before.  

Barbie is a doll.  A little plastic toy, one with preternaturally perky breasts and platinum hair, that you can fit in your pocket.  You do understand that she's a doll, right?