If you do not get traffic on your online store, you will not have sales, so no profits. Therefore, if you are running an online store, you also need to build traffic source. You can build traffic through various methods like search engine ranking or search engine marketing, social media marketing, email marketing, paid advertising, etc. Some methods are completely free, for instance if you do SEO and manage to rank high, you can get free traffic. Some methods are paid, for instance search engine marketing needs money. You need knowledge, skill, and money to build traffic on your online store. You can also build followers on social media for traffic.