Klout measures influence online. When you create content or engage, you impact others. Klout analyzes that impact to find your Klout Score, influential topics, and your influencers.
Klout is the standard for influence. Top brands such as Disney, Audi, and Turner use Klout Perks to reach and engage influencers. Over 3,000 applications and partners use Klout data to display Klout Scores, prioritize based on Score or topics, and segment users.
Read more about Klout and what we measure here: http://klout.com/#/understand/