This study aims to determine (1) What is the consumer's perception of OPPO smartphone advertising (2) What is the buying interest of OPPO smartphone consumers (3) How does advertising affect the purchase interest of OPPO smartphone consumers. This research method is inferential statistics that are descriptive and verification. The definition of advertising is taken according to Kotler and Keller (2018; 631) where advertising is any payment from a non-personal company and promotion of ideas, goods, or services by identified sponsors, while Buying Interest According to Sciffman and Kanuk (in Adi, 2015: 36) is an attitude consumer who are happy with these objects by paying money or by sacrifice.
 The research data were obtained by distributing questionnaires about advertisements and asking 50 respondents to buy consumers. The analysis technique used in this research is simple linear regression analysis using the IBM SPSS statistics application. The results of this study indicate that advertising and consumer buying interest show high and the influence of advertising on consumer buying interest in OPPO Smartphone products is significant.
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