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Reference.org
Retention rate
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<p>Retention rate is a <a href="/facts/Statistics/DNPsKGYU">statistical</a> measurement of the proportion of people that remain involved with a group from one time period to another. </p><p>The concept is used in many contexts, including marketing, investment, education, employee management, research, and clinical trials. The exact definition depends on the context. As a general rule, high retention corresponds to a positive outcome. </p><p>In <a href="/facts/Marketing/LttVQ66t">marketing</a>, retention rate count <a href="/facts/Customers/oGqcqmhf">customers</a> and their activity irrespective <a href="/facts/Financial_transaction/boHRc8mw">transactions</a> they make. </p><p> In a survey of nearly 200 senior marketing managers, 63 percent responded that they found the "retention rate" metric very useful. </p>