To start an online store with Shopify, you need a few basic elements: a product or a line of products to sell, a business name and domain, and an understanding of your target market. Shopify provides a comprehensive suite of tools to help you build your store, including website templates, payment processing capabilities, and marketing tools. Additionally, integrating with apps from the Shopify App Store can extend your store’s functionalities to meet specific needs such as email marketing or customer loyalty programs.