When did sentiment analysis technology first become widely available as a commercial product for retail customer feedback analysis?

Test your knowledge about the development of sentiment analysis technology in language processing! Sentiment analysis has transformed how businesses understand customer feedback and language patterns. This technology has revolutionized retail customer service, market research, and brand monitoring by automatically detecting emotions and opinions in text. How much do you know about when this game-changing linguistic technology first became commercially viable?

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Late 1990s, with the first basic positive/negative classification systems
Mid-2000s, following breakthroughs in natural language processing algorithms
Early 2010s, after the rise of social media platforms
2015 and later, only after deep learning became mainstream