Click-through rate (CTR) is the number of users who click on a specific link out of the total users who view a page, email, or advertisement.mail click-through rate is expressed as a percentage, and calculated by dividing the number of click throughs by the number of tracked messages delivered. Most email marketers use this metrics along with open rate, bounce rate and other metrics, to understand the effectiveness and success of their email campaign.
Moonbat is a pejorative political epithet used in United States politics, referring to liberals, progressives, or leftists.
The Moon is a Harsh Mistress is one of the high points of modern science fiction, a novel bursting with politics, humanity, passion, innovative technical speculation, and a firm belief in the pursuit of human freedom. The Moon is a Harsh Mistress is the winner of the 1967 Hugo Award for Best Novel.