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.
Basalt is also an abundant rock on the Moon. Much of the Moon's surface is underlain by basaltic lava flows and flood basalts. These areas of the Moon are known as lunar maria.. Large areas of the Moon have been resurfaced by extensive basalt flows which may have been triggered by major impact events.