Which innovative retail strategy did Duolingo implement in 2020 that dramatically increased their premium subscription revenue by over 100%?

Test your knowledge about one of the most successful language learning platforms in the world! Duolingo has transformed how people learn languages through gamification and AI-powered personalization. But how well do you know the business strategies and innovations that have made this green owl a global phenomenon in language education technology?

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• The introduction of Duolingo Plus with offline capabilities and no ads
• The 'Hearts' system that limits daily mistakes unless users subscribe
• Launching celebrity-voiced characters like Lily from Blackpink
• Adding conversation practice with GPT-powered AI tutors

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