OSoV

Online Share of Voice (OSOV) measures the relative share of online mentions of a brand (company or product) - especially in Social Media forums - relative to competitors. ^[1]

Klout Score is an indicator of social media influence (for companies or individuals). Taking into account Facebook, Twitter, LinkedIn, YouTube, and other forums, it provides a score between 0 and 100 which is based on a number of (constantly evolving) criteria including the size of your network, the level of interactions. ^[2]

Bounce Rate essentially represents a measure of website attractiveness. It measures the percentage of initial visitors to a website who ‘bounce’ away to a different site, rather than continue on to other pages within the same site. ^[3]
As a broad rule of thumb, you’re aiming for a website bounce rate of under 40%. Between 40% and 55% is usually okay, while 55-65% shows significant room for improvement ^[4]