The internet has become into a fundamental aspect of our society. With more and more individuals having access to the internet, online shopping has become increasingly popular. There is a huge window of opportunity for merchants to experiment with non-traditional retailing methods as a result of this. These days, every big retailer uses e-retailing to try to corner the market. A dramatic shift in consumers' buying habits has occurred during the past few years. Customers have high expectations for online retailers, and rightly so: they want everything to be as easy as possible for them. Furthermore, this has become a reality thanks to the rise of online shopping. Online shopping provides a more varied, hassle-free, and interesting shopping experience in a country like India, where a large proportion of the working-age population contributes to a well-paid consumer base and where people rely on metro cities for finding commodities with good quality and wide selection. The objectives of the study are i) the expectation and perception of the customers towards the online shopping and to measure the gap between the expected and perceived service quality. The study is empirical and carried out in Namakkal district, Tamil Nadu. 250 sample respondents are selected using convenient sampling method. The customers buying products through online shopping have been purposively selected for the study. The data were collected using questionnaire and Google forms. The researcher concluded that the perception of the customers towards the online shopping is high and they are satisfied better in all the dimensions of the service quality.