서비스 분석 101

1.리텐션 (1) Classic Retention

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2.리텐션 (2) Rolling Retention

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3.리텐션 (3) Range Retention

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4.리텐션 (4) Stickiness

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5.리텐션 (5) 리텐션 차트, 리텐션 커브

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