Activist investors such as Starboard Value hedge fund are pushing Yahoo to sell its Yahoo businesses and keep its investment in Yahoo Japan (35% stake valued at $8.6 billion) and Alibaba (16.5% stake valued at $35 billion). This would mean the sale of the Yahoo brand with 210 million visitors to its website each month. Yahoo's board has tried changing CEO's, and Marissa Mayer in office for 4 years has tried different strategies including acquisitions but failed to make a difference. Yahoo is not able to generate profits from its business the way Google and Facebook have done, and large investors are losing patience with Mayer. Mobile's importance has grown in recent years benefitting Facebook and Google but not Yahoo in generating more advertising revenues. Yahoo's content is seen as commoditized not commanding the advertising revenue of sites that help navigate the internet (Google) or social media sites (Facebook) that offer unique value to users.