INTRODUCTION Business is the use of electronic media to carry out commercial transactions. This work will consist of studying the various factors that influence customer decisions with respect. How they use and interact with e-commerce companies. E Business is not only limited to online sales, but also includes: An online electronic catalogue, with all the products available for sale, the price and sometimes their availability (product in stock or number of days before delivery); A search engine to easily find a product using search criteria (brand, price range, keyword,...); A virtual shopping cart system (sometimes called shopping cart): this is the heart of the e-system commercial. The virtual cart allows you to keep track of the customer's purchases throughout their career and to modify the quantities for each reference; Payment via the secure online network (accounting) is often provided by a trusted third party (a Bank) via a secure transaction; An order tracking system to track the order processing process and sometimes to obtain parcel information from the courier.1. Online payment.Paying online means paying via the internet. Customers are influenced by online payments due to the reduction in risks of fraud and unpaid invoices. Online payment is made in the secure part of the site, on the website of a bank or merchant. To pay online, simply indicate your credit card number and its expiration date. This is possible thanks to the electronic signature and certificate. It is possible to pay online through different tools: Pay online by credit cardThe buyer is led to a safe space. He is then asked for his name and bank details (16-digit number, 4 digits of the... card center... interactive marketing that places the customer at the center of the commercial universe of e-businesses. The interaction channels such as email, social media, mobile or call centers must be tightly integrated with online and offline contact moments via websites and other online presences. A holistic approach with a virtuous circle of data, contact moments and transactions, combined with personalized content and promotions , allows e-commerce companies to improve the lead maturation process and customer satisfaction. As a result, sales and customer loyalty increase.CONCLUSION.There are many factors that influence customer service in a few lines. mission of the services is to satisfy the customer which represents a great challenge for companies, control processes and motivate teams, facilitate contact with customers through the Internet.