What is Regularization in Logistic Regression?

Updated May 17, 2026

Short answer

Regularization prevents overfitting by penalizing large coefficients.

Deep explanation

L1 regularization promotes sparsity, while L2 shrinks coefficients smoothly. Regularization improves generalization.

Real-world example

Marketing models reduce noise using L1 regularization.

Common mistakes

  • Applying strong regularization without tuning.

Follow-up questions

  • What is ElasticNet?
  • Why use L1?

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