Social media helps empower business women. Being able to connect on social networking sites gives business women a support group not readily found offline where female CEOs of Fortune 500 companies are outnumbered by male CEOs 15 to 485. [15] Many social media sites are dominated by women: 72% of Pinterest users are women, 58% of Facebook users, 62% of MySpace users, 60% of Yelp users, and 53% of Instagram users. [16] Business women useTwitter chats to support each other, give and receive peer knowledge, and have guest "speakers" share expert knowledge. [17] One.org helps African women entrepreneurs connect on social media to grow their businesses. [18]