WORD OF THE DAY

Click-through Rate (CTR)

Metric for the average number of click-throughs per hundred impressions, measured as a percentage.  The CTR expresses the immediate audience response to a particular ad, email or call-to-action, but it’s not indicative of an impression’s overall success.

Source: MarketingTerms
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> Click-through Rate (CTR)

WORD OF THE DAY

Impression

Metric that measures the viewership of a single display of a particular ad on a webpage, and is used to determine advertising fees on some search engines.

Source: MarketingTerms
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> Impression

WORD OF THE DAY

Run-of-Site (ROS)

Online ad buying tactic that rotates ads on various pages on a single website or network.  This is used to generate broader traffic by reaching out to random users as opposed to a target audience.

Source: DigitalMarketingGlossary
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> Run-of-Site (ROS)