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The growth of information technology has driven changes in consumer behavior, one of which is through e-commerce platforms such as Shopee. This phenomenon has generated a large number of customer reviews, including those for local cosmetic products such as Wardah. These reviews serve as an important source of information for understanding customer perceptions and satisfaction levels. However, manual analysis of large and linguistically diverse datasets is inefficient and potentially subjective. This study aims to implement the multi-category Naive Bayes algorithm to classify the sentiment of Wardah product reviews on Shopee into three categories: positive, negative, and neutral. The data were collected using a web scraping technique and processed through a series of preprocessing stages including case folding, tokenization, stopword removal, stemming, and text cleaning. Subsequently, term weighting was performed using the TF-IDF method prior to classification. Model performance was evaluated using a confusion matrix as well as accuracy, precision, and recall metrics. The results indicate that the multi-category Naive Bayes algorithm achieved an accuracy of 86.00%, a precision of 86.63%, and a recall of 98.24%. This approach can assist business practitioners in objectively understanding customer opinions and support decision-making in business strategy and product development.

This research investigates how celebrity endorsements, customer reviews, and pricing affect consumers’ intention to purchase Scarlett Whitening products. Amid intense competition in the skincare industry, firms are required to focus not only on product features but also on psychological and perceptual aspects that influence consumer behavior. Celebrity endorsers contribute to strengthening brand trust, customer reviews offer insight based on user experiences, while price reflects consumers’ perceived value of the product. This study adopts a quantitative explanatory design, with data obtained from 204 respondents through structured questionnaires using a five-point Likert scale. The collected data were analyzed using multiple linear regression with SPSS version 26. The findings indicate that celebrity endorsers, customer reviews, and price have both simultaneous and individual positive and significant impacts on purchase intention. An adjusted R-square value of 0.274 suggests that these variables account for 27.4% of the variation in consumers’ purchase intention. Overall, the results highlight that appropriate endorsements, trustworthy reviews, and competitive pricing collectively enhance consumers’ intention to purchase Scarlett Whitening products

This study aims to examine the influence of advertising appeal, influencer marketing, and online customer reviews on purchasing decisions in Tokopedia’s e-commerce platform. The research applied a quantitative method using survey questionnaires distributed to 109 Tokopedia users in Jakarta. Data were analyzed using path analysis with SmartPLS. The results indicate that advertising appeal and influencer marketing significantly and positively affect purchasing decisions, while online customer reviews show no significant impact. These findings suggest that Tokopedia consumers, particularly in electronic products, are more influenced by attractive advertising and influencer endorsements than by online reviews. The study is limited by its sample size, geographic scope, and product focus on electronics. Future research is recommended to expand respondents and product categories for broader insights.

This research aims to examine the influence of Brand Awareness, Social Media Marketing, and Online Customer Reviews on the purchasing decisions of Hijab Azzura among the community of Garu II Harjosari I Medan Amplas. This study uses a quantitative research method with a questionnaire research design. The subject of this research is Hijab Azzura, and the object of the study is consumers who purchase Hijab Azzura, totaling 97 respondents. Data collection techniques include observation, questionnaires, and documentation. Data analysis techniques involve validity tests, reliability tests, and classical assumption tests. The data analysis method used is multiple linear regression with the assistance of SPSS 25 software. The t-test results show that Brand Awareness has a positive effect on purchasing decisions. Social Media Marketing has a positive effect on purchasing decisions. Online Customer Reviews also influence purchasing decisions. The F-test results indicate that Brand Awareness, Social Media Marketing, and Online Customer Reviews simultaneously affect the purchasing decisions of Hijab Azzura among the community of Garu II Harjosari I Medan Amplas, with an F calculated value of 12.781 > F table value of 2.700, and a significance value of 0.000 < 0.05. The adjusted coefficient of determination (R Square) is 0.292, meaning that 29.2% of the dependent variable can be explained by the independent variables, while the remaining 70.8% is explained by other variables outside the ones studied.    

TikTok Shop is a popular application that offers online shopping and interaction experiences for consumers. Marketers at TikTok Shop use various methods to encourage consumer decisions to make purchases. This study aims to determine the effect of celebrity endorsers, online customer reviews, and viral marketing on purchasing decisions for TikTok Shop e-commerce products. This study uses a quantitative method with a survey approach by providing questionnaires to respondents. The population studied was all people in Semarang City who have the TikTok Shop application and have purchased products through the application. A sample of 112 people was taken using the convenience sampling technique. Data were obtained through questionnaires and analyzed using multiple linear regression analysis, F test, R2 test, and t test. The results of the study indicate that celebrity endorsements have a positive and significant effect on consumer purchasing decisions for Tiktok Shop users in Semarang City. The increasing use of celebrity endorsements will encourage consumer decisions to buy. Online customer reviews have a positive and significant effect on consumer purchasing decisions for Tiktok Shop users in Semarang City. The more positive online customer reviews, the more it will encourage consumer decisions to buy. Viral marketing has a positive and significant effect on consumer purchasing decisions for Tiktok Shop users in Semarang City. The increasing use of viral marketing will encourage consumer decisions to buy.