1) Google is developing a mobile phone operating system called Android to challenge Microsoft's dominance in mobile operating systems and gain control of the growing mobile internet market.
2) Google's Android operating system is being developed internally and will be provided freely to phone manufacturers and carriers in an effort to gain wide adoption on mobile phones.
3) Developing a successful mobile operating system would help address Google's concerns about slowing growth from desktop search and help gain revenue from the fast growing mobile internet advertising market. However, cracking the entrenched mobile market will be very challenging given competition from Microsoft, Apple, RIM and others.