What does this mean?

Some people may be thinking, "Why does it matter what kind of magazines teenagers read?". It actually does matter as these magazines are some of the most popular among teenagers. This means that a majority of teenagers are reading these magazines, perhaps following the advice given in them, and being influenced by these magazines.

SOURCE: http://www.washingtonpost.com/news/local/wp/2015/01/21/as-u-s-test-scores-lag-study-shows-violence-poverty-teen-pregnancy-are-high/

From this graph, we can see that the United States has one of the highest teen pregnancy rates compared to other developed countries. Coincidentally, both Seventeen and Teen Vogue magazines are based in the United States and seem to be targeted at teenagers in the United States. In a country where the most popular teen magazines have to deal with fashion, beauty, and style, instead of education, science, mathematics, etc. we see that there is a huge amount of teen pregnancy. Teenagers nowadays are to focused on their looks, popularity, fashion instead of their education and the pursuit of knowledge.