Stop word removal is the process of filtering out common words from a text that are often considered to carry little meaning, such as 'and', 'the', and 'is'. This technique is crucial in text analysis and sentiment analysis as it helps to reduce noise in the data, allowing more focus on significant words that contribute to understanding the overall sentiment or topic of the text. By removing these stop words, algorithms can work more efficiently and effectively, leading to better insights from the text data.
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