The aim of the research is to analyze the influence of viral marketing and customer reviews on purchasing decisions with consumer trust as a mediating variable. In marketing theory, purchasing decisions can be improved by mediating consumer trust, so that products can be sustainable. The study was conducted on Indonesian iced tea products, which are typical tea leaf products from Indonesia. The type of research used in this research is quantitative and analyzed using PLS. 105 respondents in the research were customers of Indonesian iced tea products in Palangka Raya City. The research results show that viral marketing, customer reviews mediated by consumer trust variables had a significant positive effect on purchasing decisions, viral marketing had a significant positive effect on purchasing decisions, viral marketing had a significant positive effect on consumer trust, customer reviews had a significant positive effect on purchasing decisions, customer reviews had a significant positive effect on consumer trust and consumer trust had a significant positive effect on purchasing decisions for Indonesian Iced Tea products in the city of Palangkaraya.

The aim of this study is to analyze the effect of e-service quality, consumer trust and social media marketing on intention to use online transportation services. The method used in this research is quantitative methods, data collection is executed by distributing questionnaires to consumers of Online Transportation Services. The population of this study is the Jabodetabek Online Transportation Services consumers whose numbers have not been identified with certainty. The questionnaire was distributed electronically using a simple random sampling technique. The results of the questionnaire returned were 180 respondents. Based on the results of data analysis, it is concluded that E-Service Quality has a significant effect on Intention to Use Online Transportation Services. Consumer Trust has no effect on Intention to Use Online Transportation Services. Social Media Marketing has a significant effect on Intention to Use Online Transportation Services.

The Covid-19 pandemic has limited freedom of movement. E-commerce sites are growing rapidly and are becoming the main choice today when the virus becomes more prevalent. Trust is the key in creating online shopping satisfaction on e-commerce sites. This research was conducted to determine the effect of E-Service Quality and E-Security on Trust towards E-Satisfaction in the largest e-commerce site in Indonesia called Tokopedia. The research method used is quantitative. The population in this research is Tokopedia customers who are members of the Facebook group with a sample size of 400 people. The results of the study show that there was a relationship between the E-Service Quality and Trust, there was no relationship between the E-Service Quality and E-Satisfaction, there was a relationship between the E-Security variable and Trust, there was a relationship between the E-Security variable and E-Satisfaction. There was also a joint influence of E-Service Quality and E-Security variables on Trust, there was a relationship between the Trust variable and E-Satisfaction. This research is a development from the previous research where there was an effect of E-Service Quality and E-Security on E-Satisfaction. By adding the Trust variable as a moderate variable and E-Satisfaction as the dependent variable, the researchers found that the impact of Trust on E-Satisfaction was greater than the direct effect between E-Service Quality and E-Security on E-Satisfaction. Based on these results, it can be seen that the level of trust can increase E-Satisfaction.