Google asks that you put your idea into one of the following categories and consider the evaluation criteria below.

• Community: How can we help connect people, build communities and protect unique cultures?
• Opportunity: How can we help people better provide for themselves and their families?
• Energy: How can we help move the world toward safe, clean, inexpensive energy?
• Environment: How can we help promote a cleaner and more sustainable global ecosystem?
• Health: How can we help individuals lead longer, healthier lives?
• Education: How can we help more people get more access to better education?
• Shelter: How can we help ensure that everyone has a safe place to live?
• Everything else: Sometimes the best ideas don't fit into any category at all.

And with these criteria:

• Reach: How many people would this idea affect?
• Depth: How deeply are people impacted? How urgent is the need?
• Attainability: Can this idea be implemented within a year or two?
• Efficiency: How simple and cost-effective is your idea?
• Longevity: How long will the idea's impact last?

For more information, visit here